Fraunhofer Institute for Industrial Mathematics ITWM Hall 7 / L1

Exhibitor Profile

Das Fraunhofer ITWM besitzt langjährige Erfahrung in der Modellierung und Simulation von Filtrations- und Separationsprozessen.

Das Anwendungsspektrum der Simulationstools und –dienstleistungen umfasst die Optimierung von Filtermedien und –elementen (u.a. Effizienz, Standzeit), von Feldflussfraktionierungsprozessen sowie die rechnergestützte Untersuchung von reaktiven Strömungen in porösen Medien. In Verbindung mit Simulationen der Herstellung von Filtermedien (z.B. Meltblown-Prozess) kann die gesamte Prozesskette von der Faser bis zum Filter rechnergestützt optimiert werden. Hierdurch lässt sich die Anzahl der zeit- und kostenaufwändigen Tests an Prototypen reduzieren und gleichzeitig können Produktivität und Qualität erhöht werden.

Fraunhofer ITWM has years of experience in the modelling and simulation of filtration, separation and purification processes.

The software solutions and simulation services include the optimization of filter media and elements (efficiency, lifetime), field flow fractionation in microfluidics and the prediction of reactive flow in porous media. Combined with modeling and simulation of the media manufacturing (e.g. meltblown process), a computer-aided optimization for the entire chain from fiber to filter is available. The number of time-consuming and costly tests with prototypes can be significantly reduced while both productivity and quality can be increased.

Products / Markets

Product Index

  • Absorptionsfilter
  • Automobilfilter
  • Filterelemente
  • Filtergehäuse
  • Filtermedien
  • Filterpatronen
  • Kraftstoff-Filter
  • Luftfilter
  • Medizinische Filter
  • Membranen
  • Simulation
  • Synthetische Fasern
  • Technische Textilien
  • Ultrafiltration
  • Umkehrosmose
  • Vliesmaterialien
  • Wasserfilter
  • Ölfilter

Market Scope

  • Abwasserwirtschaft
  • Automobilindustrie
  • Chemische Industrie
  • Farben-, Pigment-, Beschichtungsindustrie
  • Filtrations- und Separationsindustrie
  • Kunststoffverarbeitende Industrie
  • Lebensmittel-,Getränkeindustrie
  • Pharmazeutische Industrie
  • Textilindustrie
  • Zellstoff-, Papierindustrie

Product Index

  • Absorption Filters
  • Air Filters
  • Automotive Filters
  • Filter Cartridges
  • Filter Elements
  • Filter Housings
  • Filter Media
  • Fuel Filters
  • Medical Filters
  • Membranes
  • Nonwovens
  • Oil Filters
  • Reverse Osmosis
  • Simulation
  • Synthetic Fibres
  • Technical Textiles
  • Ultrafiltration
  • Water Filters

Market Scope

  • Automotive Industry
  • Chemical Industries
  • Filtration and Separation Industry
  • Food, Beverage Industry
  • Paint, Pigments, Coatings Industry
  • Pharmaceutical Industry
  • Plastic Industry
  • Pulp, Paper Industry
  • Textile Industry
  • Waste Water Treatment

Product Index

  • 医用过滤器
  • 反渗透
  • 合成纤维
  • 吸附式过滤器
  • 工业用纺织品
  • 无纺布
  • 模拟
  • 水过滤器
  • 汽车过滤器
  • 滤壳
  • 滤油器
  • 滤筒
  • 滤芯
  • 燃油过滤器
  • 空气过滤器
  • 超过滤
  • 过滤介质
  • 隔膜

Market Scope

  •  汽车工业
  • 制药工业
  • 化学工业
  • 塑料工业
  • 废水处理
  • 油漆、颜料、涂料工业
  • 纸浆、造纸工业
  • 纺织工业
  • 过滤与分离工业
  • 食品、饮料工业

Product Index

  • أقمشة تقنية
  • اسطوانات
  • الألياف الاصطناعية وسائل الإعلام
  • الفلترة المضاعفة
  • النضح العكسي
  • تصفية العلب
  • خراطيش فلتر
  • غير المنسوجات / اللانسيج
  • فلاتر إمتصاص
  • فلاتر السيارات
  • فلاتر الهواء
  • فلاتر زيوت
  • فلاتر طبية
  • فلاتر ماء
  • قطع فلاتر
  • محاكاة
  • مواد فلاتر المحروقات
  • مواد فلترة

Market Scope

  • الصناعات الدوائية
  • الصناعات الغذائية وصناعة المشروبات
  • الصناعة الكيماوية
  • الصناعة النسيجية
  • الصناعة الورقية
  • صناعات الفلترة وفصل المواد
  • صناعة البلاستيك
  • صناعة الدهانات والصبغات والتلبيس
  • صناعة السيارات
  • معالجة مياه الصرف

Product Index

  • Cartouches de filtres
  • Eléments de filtre
  • Fibres Synthétiques
  • Filtres automobiles
  • Filtres médicaux
  • Filtres à absorption
  • Filtres à air
  • Filtres à carburant
  • Filtres à eau
  • Filtres à huile
  • Les boîtiers de filtre
  • Membranes
  • Médias de filtre
  • Non tissés
  • Osmose inversée
  • Simulation
  • Textiles techniques
  • Ultrafiltration

Market Scope

  • Industrie automobile
  • Industrie chimique
  • Industrie de filtration et de séparation
  • Industrie de la pâte de cellulose et du papier
  • Industrie de peintures, pigments et revêtements
  • Industrie des matières synthétiques
  • Industrie pharmaceutique
  • Industrie textile
  • Industries alimentaires et des boissons
  • Traitement des eaux usées

Product Index

  • Alloggiamenti filtro
  • Cartucce filtri
  • Elementi filtranti
  • Fibra sintetica
  • Filtri aria
  • Filtri carburante
  • Filtri di assorbimento
  • Filtri medicali
  • Filtri olio
  • Filtri per acqua
  • Filtri settore automobilistico
  • Membrane
  • Mezzi filtranti
  • Non tessuti
  • Osmosi inversa
  • Simulazione
  • Tessuti tecnici
  • Ultrafiltrazione

Market Scope

  • Settore alimenti e bevande
  • Settore automobilistico
  • Settore chimico
  • Settore filtrazione e separazione
  • Settore industria dell carta e della cellulosa
  • Settore industria tessile
  • Settore parafarmaceutico
  • Settore pitture, pigmenti e rivestimenti
  • Settore plastica
  • Trattamento acque reflue

Product Index

  • Elementy filtra
  • Filtry absorbcyjne
  • Filtry do wody pitnej
  • Filtry do zastosowań medycznych
  • Filtry oleju
  • Filtry paliwa
  • Filtry powietrza
  • Filtry samochodowe
  • Materiały nietkane
  • Media filtrów
  • Membrany
  • Obudowy filtrów
  • Odwrócona osmoza
  • Symulacja
  • Tekstylia techniczne
  • Ultrafiltracja
  • Wkłady filtra
  • Włókno syntetyczne

Market Scope

  • Filtrowanie i separacja
  • Oczyszczanie ścieków (waste water)
  • Produkcja farb i lakierów
  • Przemysł celulozowo-papierniczy
  • Przemysł chemiczny
  • Przemysł farmaceutyczny
  • Przemysł samochodowy
  • Przemysł spożywczy
  • Przemysł tekstylny
  • Przemysł tworzyw sztucznych

Product Index

  • Carcaças de Filtro
  • Cartuchos filtrantes
  • Elementos filtrantes
  • Fibres Synthétiques
  • Filtros de absorção
  • Filtros de ar
  • Filtros de combustível
  • Filtros de água
  • Filtros de óleo
  • Filtros medicinais
  • Filtros para automóveis
  • Meios de filtragem
  • Membranas
  • Não-tecidos
  • Osmose inversa
  • Simulação
  • Têxteis para usos técnicos
  • Ultrafiltração

Market Scope

  • Indústria alimentar, de bebidas
  • Indústria automóvel
  • Indústria de filtragem e separação
  • Indústria dos plásticos
  • Indústria farmacêutica
  • Indústria têxtil
  • Indústrias químicas
  • Pasta, indústria do papel
  • Pintura, pigmentos, indústria de revestimentos
  • Tratamento de água de despejo

Product Index

  • Абсорбционный фильтр
  • Автомеханические фильтры
  • Водяные фильтры
  • Воздушные фильтры
  • Имитация
  • Корпуса фильтров
  • Масляные фильтры
  • Медицинские фильтры
  • Мембраны
  • Нетканые материалы
  • Обратный осмос
  • Синтетические волокна
  • Технический текстиль
  • Топливные фильтры
  • Ультрафильтрация
  • Фильтрующие патроны
  • Фильтрующие элементы
  • Фильтрующий материал

Market Scope

  • Автомобильная промышленность
  • Бумажная промышленность
  • Лакокрасочная промышленность
  • Отрасль фильтрации и сепарирования
  • Очистка сточных вод
  • Производство пластмасс
  • Производство продуктов питания и напитков
  • Текстильная промышленность
  • Фармацевтическая промышленность
  • Химическая промышленность

Product Index

  • Cartuchos de filtro
  • Elementos de filtro
  • Fibra Sintética
  • Filtro de Viviendas
  • Filtros de absorción
  • Filtros de aceite
  • Filtros de agua
  • Filtros de aire
  • Filtros de automoción
  • Filtros de combustible
  • Filtros médicos
  • Medios de filtro
  • Membranas
  • Non-Wowens
  • Osmosis inversa
  • Simulación
  • Tejidos técnicos
  • Ultrafiltración

Market Scope

  • Industria de la alimentación y las bebidas
  • Industria de la automoción
  • Industria de la filtración y la separación
  • Industria de la pasta de madera, el papel
  • Industria de las pinturas, pigmentos, revestimientos
  • Industria de los plásticos
  • Industria farmacéutica
  • Industria textil
  • Industrias químicas
  • Tratamiento de aguas residuales

Product Index

  • Absorpsiyon Filtreleri
  • Dokunmamış Mamuller
  • Filtre Elemanları
  • Filtre Gövdeleri
  • Filtre Kartuşları
  • Filtre Ortamı
  • Hava Filtreleri
  • Membranlar
  • Otomobil Filtreleri
  • Sentetik Elyaf
  • Simülasyon
  • Su Filtreleri
  • Teknik Tekstiller
  • Ters Ozmos
  • Tıbbi Filtreler
  • Ultrafiltrasyon
  • Yakıt Filtreleri
  • Yağ Filtreleri

Market Scope

  • Atıksu Arıtma
  • Boya, Pigment, Kaplama Endüstrisi
  • Filtrasyon ve Ayırma Endüstrisi
  • Gıda, İçecek Endüstrisi
  • Kimya Endüstrisi
  • Otomotiv Endüstrisi
  • Plastik Endüstrisi
  • Selüloz, Kağıt Endüstrisi
  • Tekstil Endüstrisi
  • İlaç Endüstrisi

Product Index

  • 공기 필터
  • 기능성 섬유
  • 물 필터
  • 부직포
  • 분리막
  • 시뮬레이션
  • 여과재
  • 역삼투
  • 연료 필터
  • 오일 필터
  • 의료 필터
  • 자동차 필터
  • 필터 엘리먼트
  • 필터 카트리지
  • 필터 하우징
  • 한외 여과
  • 합성섬유
  • 흡수 필터

Market Scope

  • 섬유 산업
  • 식음료 산업
  • 여과 및 분리 산업
  • 자동차 산업
  • 제약 산업
  • 제지, 종이 산업
  • 페인트, 안료, 도장 산업
  • 폐수 처리
  • 플라스틱 산업
  • 화학 산업

Product Index

  • エアフィルター
  • オイルフィルター
  • シミュレーション
  • テクニカル繊維
  • フィルターエレメント
  • フィルターカートリッジ
  • フィルターハウジング
  • フィルターメディア
  • 不織布
  • 医療用フィルター
  • 合成繊維
  • 吸収フィルター
  • 水フィルター
  • 燃料フィルター
  • 自動車用フィルター
  • 逆浸透
  • 限外濾過

Market Scope

  • パルプ、製紙業界
  • プラスチック業界
  • 化学工業
  • 医薬品業界
  • 塗料、顔料、コーティング産業
  • 汚水処理
  • 濾過および分離技術工業
  • 繊維業界
  • 自動車産業
  • 食品、飲料業界

Press release

Softwaretools und Dienstleistungen für die Filtration

Das Fraunhofer ITWM besitzt langjährige Erfahrung in der Modellierung und Simulation von Filtrations- und Separationsprozessen. Das Anwendungsspektrum der Simulationstools und -dienstleistungen umfasst die Optimierung von Filtermedien und -elementen (u.a. Effizienz, Standzeit), von Feldflussfraktionierungsprozessen sowie die rechnergestützte Untersuchung von reaktiven Strömungen in porösen Medien. In Verbindung mit Simulationen der Herstellung von Filtermedien (z.B. Meltblown-Prozess) kann die gesamte Prozesskette von der Faser bis zum Filter rechnergestützt optimiert werden. Hierdurch lässt sich die Anzahl der zeit- und kostenaufwändigen Tests an Prototypen reduzieren und gleichzeitig können Produktivität und Qualität erhöht werden.

Software Tools and Services for Filtration

Fraunhofer ITWM has years of experience in the modelling and simulation of filtration, separation and purification processes. The software solutions and simulation services include the optimization of filter media and elements (efficiency, lifetime), field flow fractionation in microfluidics and the prediction of reactive flow in porous media. Combined with modeling and simulation of the media manufacturing (e.g. meltblown process), a computer-aided optimization for the entire chain from fiber to filter is available. The number of time-consuming and costly tests with prototypes can be significantly reduced while both productivity and quality can be increased.

Conference Presentation/s

Assessing cloudiness in non-wovens

M. Godehardt, A. Moghiseh, C. Oetjen, K. Schladitz*, Fraunhofer Institute for Industrial Mathematics (ITWM); J. Ohser, University of Applied Science Darmstadt; S. Ringger, I. Windschiegel, Institute for Textile Tech­no­logy and Process Engineering Denkendorf (ITV), Germany

Learn more at FILTECH 2022 Conference

The homogeneity of filter media is important for material selection and quality control, along with the specific weight (nominal grammage) and the distribution of the local weight. Cloudiness or formation is a concept used to describe deviations from homogeneity in filter media. There are various image analysis methods for measuring cloudiness differing in the exact definition of this term. Cloudiness concepts based on the range of interaction, the coefficients of the Laplace pyramid, or the power spectrum have been suggested. Measured cloudiness is reproducible. However, cloudiness measured with varying instruments usually cannot be compared. We have developed a theoretically sound cloudiness index and a method to measure it from the power spectrum. The eligible frequency band depends on the image acquisition. Reproducibility of the method is guaranteed as long as the non-woven sample attenuates the light proportional to the material thickness. Our method is hence well suited to build a technical standard on it.

Following, we suggest to derive the cloudiness index from the power spectrum of the relative local area weight, averaged over a selected frequency range. Here, relative local area weight means local area weight divided by specific weight. This cloudiness measure has various advantages over popular alternatives, both in terms of the information contained and the robustness of the measurement [5]. The power spectrum captures the energy density in a broad spectral range. Moreover, under certain conditions, the structure of a nonwoven is fully characterized by the specific weight, the variance of the local weight, and the power spectrum. Consequently, the power spectrum is the parameter that exclusively reflects the cloudiness.

Here, we address questions arising from practical application. The most prominent is the choice of the spectral band to properly capture a non-woven’s cloudiness relevant for the physical properties as well as meeting visual perception. The band...

Virtual production of filter media using simulation driven design

A. Schmeißer*, S. Gramsch, W. Arne, R. Wegener, Fraunhofer Institute for Industrial Mathematics (ITWM); F. J. Hahn, T. Gose, A. Koronai-Bauer, K. Riedinger, F. Keller, MANN+HUMMEL GmbH, Germany

Learn more at FILTECH 2022 Conference

The emission of fine dust from industrial processes and traffic as well as contamination-sensitive manufacturing technology and clean rooms call for the provision of clean indoor air and therefore requires highly efficient air filter media. Considering the rise in energy cost and the necessity of worldwide CO2 reduction the energy consumption of air filters becomes increasingly relevant. Developing filter media featuring both highest levels of filtration efficiency and lowest possible pressure drop poses an optimization challenge, as both design goals are conflicting.

The increased demand for high performance filters gives rise to challenging engineering tasks to develop efficient filters for different applications. An important aspect in the research and development of new filter media is virtual production with software simulation. A common approach for this models filters as fibrous media with given statistical properties. Using a simulation loop, these properties can be designed to yield optimal performance. However, this does not yet account for how a filter medium with the designed properties can be produced in an actual production process. Thus, the realization of virtually predicted optimal filter media prototypes requires extensive validation in trial runs and may sometimes not be achievable.

We aim to address this issue by means of a novel, holistic approach to the virtual media development. Within the scope of a publicly funded research project, we develop a simulation chain for the simulation-driven design of new filter media demonstrated exemplary using the spunblown process.

Our coupled approach uses a complex chain for the complete simulation from the production process to the final product and its filtration properties, along with a validation of results using experiments on the corresponding real filter media. Instead of the conventional parametric material model of the resulting filter media, we use a fully physical model of the production process starting from the spinning of filaments at the spinneret, down to the stretching in turbulent airflow and web forming of the nonwoven material. The visco-elastic material models used can...

Flow-induced deformation of filter media - part 2: modeling and simulation

R. Kirsch*, O. Lykhachova, Fraunhofer Institute for Industrial Mathematics (ITWM); S. Antonyuk, V. Puderbach, Technische Universität Kaiserslautern, R. Deshpande, Ruhr-Universität Bochum, Germany

Learn more at FILTECH 2022 Conference

The majority of simulation models for filter elements assume that the filter media are “rigid bodies”. In reality however, it is observed that the fluid flow causes deformations which can lead to well-known (and undesired) effects like pleat collapse, pleat crowding etc.

Several works were devoted to the development of models and methods to take into account this Fluid-Porous-Structure Interaction (FPSI) in order to obtain more realistic simulation results. By nature, the earlier studies focused on liquid filtration applications, of which only few are mentioned here: In [1], an effective permeability approach was used for an improved prediction of the relationship between pressure drop and flow rate in pleated cartridges. A coupling of flow and structural mechanics simulation based on Stokes-Brinkman equations and hyperelastic porous materials in three dimensions in space was presented in [2]. Taber’s model for poroelastic plates was the starting point for the numerical simulation (two-dimensional in space) and experimental validation of small flow-induced deformations in [3]. Deformations of filter media are observed in air filtration, too. In [4], a coupled simulation (two-dimensional in space) of the deformation of pleats in cabin air filters was studied.

The aim of the present work is to extend the applicability of the coupled simulations for liquid filtration at constant flow rates in a way that the simulations will be done in 3D, include faster flow regimes (Navier-Stokes-Brinkman) and allow for larger deformations and non-linear elasticity...

Influence of an inhomogeneous material distribution on the overall filtration efficiency of fibrous media

C. Mercier*, R. Kirsch, S. Osterroth, S. Rief, Fraunhofer Institute for Industrial Mathematics (ITWM), Germany

Learn more at FILTECH 2022 Conference

It is well known that the level of uniformity of nonwoven filter materials is related to their filtration efficiency and therefore, this feature is an important subject to quality control (QC). The COVID19 pandemic has once again revealed the importance of efficient manufacturing processes for high-quality nonwovens, such as they are required for face masks that provide sufficient protection. While specialized 3D computer simulations have shown to be very helpful for the design and optimization of nonwovens, their computational cost is (in general) too high to allow for a quick assessment of the properties of a filter material. In addition, the acquisition of images of the microstructure created during production is not practicable.

This work is devoted to a fast and effective simulation-based analysis of the influence of the non-uniformity of the material distribution in nonwovens on their filtration efficiency. Both mechanical efficiency and the enhanced capturing due to fiber charging are included in the simulation model. ..

How programmable materials can be used to design woven filter media with optimized backwashing properties

R. Kirsch, S. Osterroth, S. Rief*, Fraunhofer Institute for Industrial Mathematics (ITWM), Germany

Learn more at FILTECH 2022 Conference

Global challenges such as sustainable development, climate change, renewable energy, or individual mobility increase the necessity for a much more efficient and sustainable use of our resources. Programmable materials have the potential to initiate a paradigm shift since they can perform system functions through their internal design. This allows for increased functional integration while simultaneously reducing system complexity. Programmable materials are materials whose inner structure is designed and manufactured in such a way that properties and behavior can be controlled and reversibly changed by external stimuli, e.g. temperature changes or chemical agents. Moreover, new manufacturing methods make it possible to specifically produce these structures in the micrometer range. These methods include for example, additive processes like 3D-printing.

In this paper, the focus is on the use of programmable materials in the area of effective filter cleaning. More precisely, we investigate weaves in a liquid filtration application. In the regular filtration step, it is desirable to have high filtration efficiencies, a low pressure drop and a high dust holding capacity. Low pressure corresponds to energy savings and low operating costs. The dust holding capacity ensures efficient use of operational capacity. When certain limits are reached, the backwashing step is performed to clean the filter medium from deposited dust. Thereby, the filter medium does not need to be replaced and maybe used several filtration cycles. However, backwashing cannot clean the medium entirely and the motivating question is: What is the potential to improve the backwashing efficiency by geometrical changes of the filter medium using programmable materials? Backwashing efficiency means short regeneration time, low clean water consumption and minimal particulate residues. We answer the above question by...

On pore scale numerical simulation of complex homogeneous reactions with application to filtration processes

O. Iliev*, P. Toktaliev, Fraunhofer Institute for Industrial Mathematics (ITWM), Germany

Learn more at FILTECH 2022 Conference

Numerical modeling at pore-scale which is based on high-resolution CT images has proven its validity and importance in many areas. It is especially important in the case of heterogeneous porous media (e.g., broad pore size distribution with potential for channeling effects) and chemical heterogeneity (e.g., nonuniform distribution of the size and locations of the washcoat particles/coating layer in the case of catalytic filters, nonuniform distribution of the size and locations of active carbon particles in air filters, etc.). Typically the reactive transport is described by convection and diffusion processes in the pore space and by homogeneous reactions within the reactive particles (washcoat, active carbon, etc.). Note that earlier we have addresses heterogeneous reactions, here we concentrate on homogeneous reactions, mainly in connection with catalytic filters. To be more precise, the reactions are heterogeneous at nanoscale, however here our investigations are carried out at micron scale, and the nanoscale heterogeneous reactions are averaged to homogeneous reactions at micron scale. To tackle pore scale simulation of reactive transport Fraunhofer ITWM has developed PoreChem Software which is a highly scalable solver for multispecies reactive flow in porous media. PoreChem uses a voxelized representation of geometry, includes implementation of numerical solution of Stokes(-Brinkman) equation for the flow problem and convection-diffusion-reaction equations for species transport, and can be used for problems with up to tens of billions of voxels.

In [1] PoreChem was used for pore scale simulations in the case of first order reaction. The role of the geometrical and chemical heterogeneity was highlighted. Nevertheless, reduction of the whole Selective Catalytic Reduction (SCR) process to a first order reaction has limited applicability and neglects reactions in the non-porous region and complex chemical transformations in the washcoat. Thus, in the current paper, we discuss several complex reactions...

Microscale modelling and simulation of the removal of water from diesel fuel using hydrophobic separator meshes

S. Antonyuk, Technische Universität Kaiserslautern; O. Elsayed*, R. Kirsch, S. Osterroth, Fraunhofer Institute for Industrial Mathematics (ITWM), Germany

Learn more at FILTECH 2022 Conference

Liquid-liquid separation systems are vital for many applications: power generators, automotive, hydraulic lines, etc. In the special case of diesel fuel, the trend towards sustainable fuel production and reduction of hazardous emissions lead to the increasing usage of ultra-low-sulfur diesel and bio-diesel. Such fuels exhibit a significantly reduced the surface tension between the diesel and the inevitable water content, rendering the removal of the water more difficult. Consequently, the design of separators in diesel fuel filters meeting today’s performance requirements imposes a challenge to the developing engineer and suitable simulation techniques. Hence, in order to improve and further optimize the current separator systems, a better understanding of the influence of material parameters such as wettability and geometric properties of the mesh on the separation performance would be very useful.

The challenge in modeling and simulation of such systems is the fact that phenomena on different length scales influence each other:

On the microscale, individual droplets are considered. In the free flow region, they are much smaller than the hydrodynamic length scale and their motion is mainly due to the flow. After coalescence at the hydrophobic separator screen, gravitational forces are more and more dominant and separation by drainage occurs. Both coalescence and drainage influence how much of the mesh surface is open. On the macroscopic scale, this affects the over-all differential pressure and the distribution of the local flow speed near the mesh, which in turn changes the transport of the water droplets towards the mesh.

The present work is devoted to the modeling and simulation of the interaction between the water droplets and the separator screen taking into account the gravity forces in the microscale. It is seen that...

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