July 19, 2023 at 10:55 amsnrSubscriber
How to calculate the mass and heat transfer coefficients in ANSYS Fluent multiphase and multicomponent simulations.
July 20, 2023 at 5:55 amSupreetha JSubscriber
Please refer to the following links on mass and heat transfer coeffecients. UDF is the easier way for the coefficient.
27.8.3. Mass Transfer Coefficient (ansys.com)
27.8.2. Heat Transfer Coefficient (ansys.com)
If you are not able to access the link, please refer to this forum discussion: Using Help with links (ansys.com)
July 20, 2023 at 11:05 amsnrSubscriber
I am seeking how to calculate the heat and mass transfer coefficients from simulation results.
July 21, 2023 at 12:07 pmSupreetha JSubscriber
Mass transfer coefficient is a value that one will set to control the phase change. Heat transfer coefficient is based on the wall flux and temperature values near wall. We have HTC variables available. Please refer to this section of Ansys User's Guide 25.10. Postprocessing for Multiphase Modeling (ansys.com)
If this does not help, could you please provide more specifics on what exactly are you trying to model and the physics used?
July 22, 2023 at 4:46 amsnrSubscriber
I am modelling the absorption of gas in a liquid. In this absorption process, I need to calculate the amount of mass that is transferred from gas to liquid (due to concentration difference), which can be represented by the mass transfer coefficient. So I want to calculate the mass transfer coefficient along with the heat transfer coefficient.
July 25, 2023 at 11:35 amPrashanthAnsys Employee
July 25, 2023 at 12:57 pmsnrSubscriber
I have incorporated these correlations into my simulation. Presently, I seek assistance in calculating the mass and heat transfer coefficients based on the simulation results. Could you please help me with this coefficients calculations?
July 26, 2023 at 10:24 amPrashanthAnsys Employee
Then you can just plot the mass-transfer-coefficient. It shows up under phase-interactions, in contours.
As for vol.htc, I think you need to somehow extract the Nu_p calculated by Fluent's correlation and insert it in the theory equation.
July 28, 2023 at 4:31 amsnrSubscriber
Thank you for your answer. Are there any tutorials available that address the above problem you mentioned? Please let me know if you have any information to share. Thanks again!
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