Equations

Saleeman1234 · August 4, 2014, 09:30

Hello

I am working on Porous domain, which is dipped in a fluid, I want to introduce my own equations of mass transport, energy transport between the two domains.
How Can I define these? where I have to define each of my variable so I will be able to get results according to my equations.

Thanks in advance

Opaque · August 4, 2014, 14:36

What are you trying to achieve that ANSYS CFX cannot do out of the box ?
Not sure what you mean by solving two domains when the porous solid phase is dipped into a fluid, they become a single domain with 2 phases.

If you are running ANSYS CFX later than R12.1, you should already be able to solve for the energy equation in the fluid and solid phases. Similarly, you can also include your own additional variables on either phase and exchange between them. For example, modeling drying of paper where you can solve for the moisture in the fluid and the solid phases (as a passive scalar of course).

If you follow the "catalytic converter" example provided in the installation, you can see how the energy equation is solved in both phases. You can enhance it by adding your own equation, see how it works and then move on to your own geometry.

Hope the above helps,

Saleeman1234 · August 5, 2014, 03:26

Thank you Opaque.

Can you please provide me the link of the example you mentioned.

August 4, 2014, 09:30	Equations	#1
Saleeman1234 Member Mansoor Saleem Join Date: Jun 2014 Posts: 31 Rep Power: 11	Hello I am working on Porous domain, which is dipped in a fluid, I want to introduce my own equations of mass transport, energy transport between the two domains. How Can I define these? where I have to define each of my variable so I will be able to get results according to my equations. Thanks in advance

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August 4, 2014, 14:36		#2
Opaque Senior Member Join Date: Jun 2009 Posts: 1,805 Rep Power: 32	What are you trying to achieve that ANSYS CFX cannot do out of the box ? Not sure what you mean by solving two domains when the porous solid phase is dipped into a fluid, they become a single domain with 2 phases. If you are running ANSYS CFX later than R12.1, you should already be able to solve for the energy equation in the fluid and solid phases. Similarly, you can also include your own additional variables on either phase and exchange between them. For example, modeling drying of paper where you can solve for the moisture in the fluid and the solid phases (as a passive scalar of course). If you follow the "catalytic converter" example provided in the installation, you can see how the energy equation is solved in both phases. You can enhance it by adding your own equation, see how it works and then move on to your own geometry. Hope the above helps,

August 5, 2014, 03:26		#3
Saleeman1234 Member Mansoor Saleem Join Date: Jun 2014 Posts: 31 Rep Power: 11	Thank you Opaque. Can you please provide me the link of the example you mentioned.