Solving Convection-Diffusion-Reaction Equations

A.jafarinia · June 18, 2018, 05:24

Dear friends,
I am going to solve convection-diffusion-reaction equations in multiphase flow using OpenFOAM 5. As far as I know it is possible to use reactingMultiphaseEulerFoam solver, but the point is that there is no solved tutorial similar to my case. I would like to know your recommendations about how to start. Which tutorial do you suggest to modify?
There is another solver reactingTwophaseEulerFoam which solves convection-diffusion-reaction in two phase. Currently I think it is possible to start with this two phase flow problem or a tutorial in multiphase flow without solving reaction like multiphaseEulerFoam. I am really confused how to start and I appreciate any kind of help. My equation are related to biochemical reactions in multiphase flow with several species like thrombus formation in blood flow.

Triggin · June 19, 2018, 02:10

Hi jafarinia

Even if you would like to start right from the top, my general purpose for working with new (unknown) solvers is:

Set up a simple geometry (maybe only with blockMesh)
Build a simple two-phase flow
Verify your solution
Add a reaction to it
Verify your solution

I made the experience that it's worth to invest this additional time to preliminary studies.

Furthermore: What are the different phases you working with? Remember: Blood is a non-newtonian fluid. What is the approx. ratio of the two phases?

Best
Triggin

A.jafarinia · June 19, 2018, 03:47

Thank you. Well, the problem is the formation of thrombus in blood. It means that at first we have only fluid which is blood; then after biochemical reactions a solid phase might form near the wall which is the thrombus.

June 18, 2018, 05:24	Solving Convection-Diffusion-Reaction Equations	#1
A.jafarinia New Member Alireza Jafarinia Join Date: Jun 2018 Location: Austria Posts: 6 Rep Power: 7	Dear friends, I am going to solve convection-diffusion-reaction equations in multiphase flow using OpenFOAM 5. As far as I know it is possible to use reactingMultiphaseEulerFoam solver, but the point is that there is no solved tutorial similar to my case. I would like to know your recommendations about how to start. Which tutorial do you suggest to modify? There is another solver reactingTwophaseEulerFoam which solves convection-diffusion-reaction in two phase. Currently I think it is possible to start with this two phase flow problem or a tutorial in multiphase flow without solving reaction like multiphaseEulerFoam. I am really confused how to start and I appreciate any kind of help. My equation are related to biochemical reactions in multiphase flow with several species like thrombus formation in blood flow.

June 19, 2018, 02:10		#2
Triggin New Member manu ebn Join Date: Aug 2015 Location: Switzerland Posts: 18 Rep Power: 10	Hi jafarinia Even if you would like to start right from the top, my general purpose for working with new (unknown) solvers is: Set up a simple geometry (maybe only with blockMesh) Build a simple two-phase flow Verify your solution Add a reaction to it Verify your solution I made the experience that it's worth to invest this additional time to preliminary studies. Furthermore: What are the different phases you working with? Remember: Blood is a non-newtonian fluid. What is the approx. ratio of the two phases? Best Triggin

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June 19, 2018, 03:47		#3
A.jafarinia New Member Alireza Jafarinia Join Date: Jun 2018 Location: Austria Posts: 6 Rep Power: 7	Thank you. Well, the problem is the formation of thrombus in blood. It means that at first we have only fluid which is blood; then after biochemical reactions a solid phase might form near the wall which is the thrombus.