Electroosmotic flow in porous media comsol multiphysics. The aim of the present work is to implement in comsol multiphysics a multiphase fluid flow model in porous media, also known in the oil reservoir engineering literature as a black oil model, using a standard finite element approach. For a better understanding of what characterizes flow through a porous material, it is worth taking a closer look at the detailed structure. For porous media having typical porosity approximately greater than 0. Fractures within a porous media effect the flow properties through the porous matrix. The computed pressure is automatically coupled to the physics describing the porous media flow in the surrounding matrix, an approximation that saves time and computational. The aim of the presentwork is to implementin comsol multiphysics a multiphase fluid flow modelin porous media, also known in the oilreservoir. Multiphase fluid flow models in porous media are frequentin many. Fluid flow simulations using new cfd module wood drying simulation. Nov 10, 2014 learn how to model porous media flow and chemical reaction in comsol multiphysics. Comsol multiphysics modeling in darcian and nondarcian.
A video tutorial for modeling reacting flow in porous media. There are various natural circumstances in which fluid flux through a porous medium is dominated by fracture flow. How to set up and run a simulation with comsol multiphysics a proper introduction on how to set up and run a model in comsol multiphysics is essential when learning how to use the software. Chemical reaction engineering module updates comsol 5. Uber comsol multiphysics modellierungsbeispiele zum. Heinemann professor for reservoir engineering leoben, october 2005 actualized by dr. The first one is the immiscible twophase flow in porous media and the second is the kis tracer transport in the wetting phase.
We discuss homogeneous approaches, including darcys law and brinkman equations. Modelling of twophase flow in porous media with volumeoffluid method bertrand lagree to cite this version. Simulation flo filtration using a porous media structure. Result from simulations show a rapid cooling of air due to the high specific surface area in the porous material. Natural fractured reservoir engineering phdg textbooks in preparation, intended to be issued during 2015. Using a macroscale approach to model porous media flow. Browse the application gallery and download tutorial models with instructions and view example apps. All of these effects are strongly coupled and predefined interfaces can be used to model these effects with the heat transfer. Reynolds number dependent porous media flow using the. Transport of diluted species in porous media tds of comsol multiphysics 5. Fluid flow simulations using new cfd module comsol. Comsol, the comsol logo, comsol multiphysics, comsol desktop, comsol server, and. For users of the heat transfer module, comsol multiphysics version 5.
With the robust interfaces in the heat transfer module, you can simulate heat transfer through porous media and account for the conduction and convection in the porous matrixs solid and openpore phases. Model transport phenomena in porous media using darcys law, including variably saturated porous media flow. Simulation of heat transfer and fluid flow in a porous bed of iron ore pellets during up draught drying annalena ljung1, t. Excerpt from the proceedings of the comsol conference 2008 hannover. Modelling of twophase flow in porous media with volumeof. Cross flow filtration being one attractive application, whereas the fluid and filtrate flow parallel the porous media, and thereby induce shearing. We use brinkman equation for modeling in the porous media, wherever darcys law is not applicable. The cell combines pressure and electroosmotic driven flow. Problem definition in this tutorial we show a very easy example how to solve fluid flow in porous media with quickersim toolbox for matlab. This interface remains unique in its coupling with the electrochemistry interfaces for the modeling of porous electrodes.
The aim of the present work is to implement in comsol multiphysics a multiphase fluid flow model in porous media, also known in the oil reservoir engineering. In fluid mechanics, fluid flow through porous media is the manner in which fluids behave when flowing through a porous medium, for example sponge or wood, or when filtering water using sand or another porous material. Modelling mass and heat transfer in a porous structure. You will also get an overview of the features and functionalities in the porous media flow module. Computational fluid flow and transport of colloidal particles in soil pores mehmet ekrem cakmak, ph. Pdf comsol multiphysics modeling in darcian and non. Geological layers can be fractured, as well as porous materials used in technical devices, for example in membranes, filters etc. Evaporation in porous media with large evaporation rates evaporation in porous media is an important process in the food and paper industries, among others.
Multiphase flow in porous media is a phase transport in porous media coupled with a darcys law, id like to know that the pressure of darcys law is the pressure of the wetting phase fluid phase s1 or some other pressure. Modelling of twophase flow in porous media with volumeof fluid method bertrand lagree to cite this version. The porous media flow module gives users within, for example, food, pharmaceutical, and biomedical industries a wide range of transport analysis capabilities for porous media. With the robust interfaces in the heat transfer module, you can simulate heat transfer through porous media and account for the conduction and convection in the porous matrixs solid. How do i calculate the porous media parameters youtube. The free and porous media flow within the model was examined as seen in fig. Case study of a catalytic convertor using porous media. For anyone interested in modeling chemical reactions andor flow through porous media, we have created a video to demonstrate how comsol multiphysics simulation software handles such applications.
Evaporation in porous media is an important process in the food and paper industries, among others. Modeling darcian and nondarcian flow in porous media. The complete pdf tutorial for cfd problems including porous media but not only can be downloaded from the homepage of this fluid dynamics toolbox. This not only gives us a deeper understanding but also gives us confidence in using macroscopic approaches to simulate flow in porous materials. Comsol multiphysics offers several physics interfaces to model porous media and subsurface flow. To learn more about modeling fluid flow in porous media with comsol multiphysics, contact us for a software evaluation. For the modeler there are various options to treat fractures in porous media.
Hydrogen is the less dense than oxygen and therefore has a faster flow rate. Porous media fluid dynamic modeling has been widely explored and utilized in many academic and industrial applications. When you use this model, you define a cell zone in which the porous media model is applied and the. A mesh file is provided with this tutorial in order to focus on the flow modelling side of the problem. This example treats the modeling of electroosmotic flow in porous media. We give a general overview, with remarks concerning the modeling using comsol multiphysics.
Introduction about the heat transfer module 18 why heat transfer is important to modeling. Comparing equations for twophase fluid flow in porous media. Evaporation in porous media with large evaporation rates. We deal with an incompressible fluid flow with pressure field p and velocity field.
Free convection in a porous medium comsol multiphysics. Cfd module, fluid flow, porous flow, heat transfer, humidity transfer, multiphysic coupling, drying process 1. Modelling flow through fractures in porous media comsol. Vof fluid flow analysis in ansys fluent tutorial tank discharge. Using the creeping flow interface in comsol multiphysics. Example cfd code to solve porous media flow in matlab. Learn how to model porous media flow and chemical reaction in comsol multiphysics. Heat transfer through the medium can also be represented, subject to the assumption of thermal equilibrium between the medium and the fluid flow, as described in section 7. Model mass, momentum, and energy transport in porous media. Modeling flow in porous media on the microscopic scale. A 1d simplification of the porous media model, termed the porous jump, can be used to model a thin membrane with known velocitypressuredrop characteristics. The options for saturated porous media include the darcys law interface for slow flow and the the physics interfaces and building a comsol multiphysics model in. The model couples the momentum balance to an energy balance through an equation, dependent on temperature, being directly typed into the source term for the momentum balance.
Verification and validation of flow and transport in cracked saturated porous media janez perko, suresh seetharam and dirk mallants belgian nuclear research centre sckcen, institute for environment, health and safety. Double click on fluid flow cfx under the analysis sytems, then double click on the fluid flow cfx under a. Pdf comsol implementation of a multiphase fluid flow model. To help the learning process, there is a streamlined. Densitydriven fluid flow in porous media comsol blog. Learn more about the porous media flow module here. In this archived webinar, learn how to use comsol multiphysics to model heat transfer in porous media. Model porous media flow and chemical reaction in comsol. Its application areas range from conventional porous media flow, based on darcys law, to nondarcian flow and multiphysics flow analysis, including the effects of heat.
The subsurface flow module users guide comsol documentation. The model exemplifies the coupling of free and porous media flow in fixed bed. Multiphase fluid flow models in porous media are frequentin many important applications of earth sciences, such as in groundwater contamination, subsurface remediation and reservoir modeling. Bulk feed to membrane surface heat transfer can be determined using following relationship. Modeling reacting flow in porous media comsol blog.
For users of the chemical reaction engineering module, comsol multiphysics version 5. Which porous media and subsurface flow interface should i. Adaptive interfacial mesh refinement is used to reduce the running time. Finally for one of the testcases some results of an extensive sensitivity study is presented. Which porous media and subsurface flow interface should i use. As commonly observed, some fluid flows through the media while some mass of the fluid is stored in the pores present in the media. A catalytic bed reactor with an injection needle is simulated and improved upon, using the reacting flow in. Modelling of twophase flow in porous media with volumeoffluid method. You will also see a demonstration of how to use a porescale model to calculate homogeneous flow properties at the macroscale level. The options for saturated porous media include the darcys law interface for slow flow and the the physics interfaces and building a comsol. The fluid flow branch represent a wide range of possibilities. Two phase flow modelling in co msol part 2 duration. The results are compared with model experiments performed under microgravity conditions. Dispersion phenomena occur in many important fields of technology, for example, in.
The densities of the gases entering the channels lead to the results shown. The computed permeability can be used in homogenized models using darcys law. The aim of the present work is to implement in comsol. If v is high going into the porous section and low coming out of it, then there must be mass buildup in the porous section. However, less is known about the gas transport in a dry material and what. Comsol implementation of a multiphase fluid flow model in porous media m. Modeling heat transfer in porous media using comsol.
A catalytic bed reactor with an injection needle is simulated and improved upon, using the reacting flow. This example models the effects of heat transfer with phase change and local. Porescale modeling of nonisothermal two phase flow in 2d. The results are compared with published literature in the field. With the new version of the free and porous media flow interface, you can couple laminar or turbulent free flow with porous media flow. A large number of studies have been conducted on saturated porous media with a fluid flow, commonly liquid. Analyze and optimize processes found in the pharmaceutical, biomedical, food, and other industries with the porous media flow module, an addon to the comsol multiphysics software. Includes uptodate tutorial coverage for using the popular comsol multiphysics 5. The richards equation interface describes nonlinear flow in variably saturated porous media. Intro to modeling porous media flow with comsol multiphysics. Flow in porous media in matlab with quickersim cfd toolbox. The fluid flow in the porous medium after 20 years, and the convection cells caused by the brine, can be seen in the figure below.
Watch this archived webinar to see how to model nondarcian flow, heat transfer, and phase change in porous media. All of these effects are strongly coupled and predefined. T f m where, t f b is temperature of bulk solution, and t f m is the surface temperature of membrane on feed side. Comsol implementation of a multiphase fluid flow model in. The equations that are solved are the continuity equations for flow velocity and current density. The darcys law interface darcys law describes fluid movement through interstices in a fully saturated porous medium that is mainly driven by a pressure gradient. Porous fluid problems are encountered in lots of engineering applications, in soils, in food, in filters. Comsol is the developer of comsol multiphysics software, an interactive environment for modeling and simulating scientific and engineering problems. Depending on the porosity of the medium this can be classified into two classes. The fracture flow interface solves for pressure on internal 2d boundaries within a 3d matrix, based on a userdefined aperture.
Salt concentrations surface plot and velocities streamlines from the comsol multiphysics solution after 20 years shows the convection cells. Various authors have given different model for fluid flow in nondarcian porous media. The microfluidics module features a dedicated physics interface for porous media flow based on darcys law. Multiphase fluid flow models in porous media are frequent in many important applications of earth sciences, such as in groundwater contamination, subsurface remediation and reservoir modeling. The dominating heat transfer mechanism is convection and two energy equations are required since the porous media region contains both fluid and solid. Here, we present comsol simulations for miscible vf in homogeneous porous media of both types.
The model comes from the porescale flow experiments conducted by arturo keller, maria auset, and sanya sirivithayapakorn of the university of california, santa barbara. Numerical investigations of the instability in displacement of viscous fluid by a less viscous one in a twodimensional and threedimensional geometry were carried out. Porous media flow within channels the secondary current distribution was then. The forchheimer flow tutorial model, which demonstrates how to couple the fluid flow in an open channel and an attached porous block. Cfd modeling of vacuum membrane distillation for removal. In his keynote talk at the comsol conference 2018 lausanne, andri bezzola of. Cornell university 2011 transport of colloidal size particulate matter is of special interest of environmental studies because colloids and adsorbed chemicals can be transported over long distances. The free and porous media flow interface 468 domain, boundary, point, and pair nodes for the free and porous. Abstract the paper is aimed at mathematical modeling of flows in porous medium. Consider this your interactive tour of the model documentation for our porous reactor model. Heat transfer in solid and fluids with comsol multiphysics. The resulting pressure and velocity fields can be plotted with the displaysolution2d function. The flow is often frictiondominated when the pore size is in the micron range and darcys law can be used.
This example treats the modeling of subsurface flow where free convection in porous media is analyzed. This paper addresses two phase flow in porous media simulated using the coupled navierstokes and cahnhilliard pfm cahn and hilliard, 1958 and solved by comsol multiphysics with finite element method. Computing porosity and permeability in porous media with a. All of these effects are strongly coupled and predefined interfaces. Model porous media flow and chemical reaction in comsol multiphysics. Pdf comsol implementation of a multiphase fluid flow model in.
Normally, you can open the model inputs section of the fluid properties tab, and there will be a reference. I have some questions about the module of multiphase flow in porous media in comsol. Ortiztapia 1instituto mexicanodelpetroleo corresponding author. Modelling of twophase flow in porous media with volumeof fluid method. Flow through porous media can also occur on microscale geometries. Selecting the right fluid flow interface for porous media. The convective heat transfer coefficient h b f consists of the impact of flow rate and temperature. Apr 01, 2018 in this video, we will talk about how to calculate the porous media coefficients for a simple homogeneous porous media from the experimentally obtained velocity vs pressure loss data. Ansys fluent porous medium tutorial part 14 duration. Pdf comsol implementation of a multiphase fluid flow. One other interesting thing, you have the pressure as p in the porous section and 0 in the turbulent section. Comsol cfd with porous media cfd online discussion forums. The aim of the present work is to implement in comsol multiphysics a multiphase fluid flow model in porous media, also known in the oil reservoir engineering literature as a black oil model, using. Hydrodynamic part is modeled using darcys law dl for fluid flow in darcian porous media, while brinkman equation br is used for the nondarcian porous media.