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#1 |
Member
Indrajit
Join Date: Nov 2012
Posts: 33
Rep Power: 13 ![]() |
Hi all,
I am simulating a two phase flow using VOF model in fluent. I need to know the length of the liquid vapor interface in the cell. This length of the interface is used in one of my UDF's.Is there any macro or something in fluent whic hcould give me acces to the interface length??? ![]() Regards, Indrajit |
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#2 |
New Member
A
Join Date: Nov 2012
Location: France
Posts: 7
Rep Power: 13 ![]() |
Hello,
Look up Interfacial Area Density.. it will involve writing a udf which allows an estimation of the interface's "length" in each cell. Best, A.B. |
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#3 |
New Member
Garvit Goel
Join Date: May 2014
Posts: 11
Rep Power: 12 ![]() |
Hi,
Can somebody please post more information on how to estimate the length of interface in the cell? Thanks |
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#4 |
New Member
A
Join Date: Nov 2012
Location: France
Posts: 7
Rep Power: 13 ![]() |
Check Yuri Egorov's (Ansys Fluent) year 2004, work on "Validation of CFD codes with PTS - relevant test cases".
Some approximations for calculating interfacial length have been provided as a function of volume fraction and its gradient in each interfacial cell. This approximation was found to be best suited for curved interfaces: A = 6 * alpha_l * alpha_g * SQRT( grad(alpha_l) * grad(alpha_g) ) A = 6 * alpha_l * (1-alpha_l) * mag ( grad(alpha_l)) A being the Interfacial area density alpha_l the liquid volume fraction grad(alpha_l) the gradient of liquid volume fraction A UDF could then be used to calculate the interfacial length for each cell. Best, A.B. |
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#5 |
New Member
John
Join Date: Mar 2019
Posts: 2
Rep Power: 0 ![]() |
I want to read this article, can you share it with me? Thank you.
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