
[Sponsors] 
September 20, 2012, 22:45 
Calculate interfacial area

#1 
New Member
Join Date: Nov 2010
Posts: 12
Rep Power: 8 
Hi all,
I'm currently simulating gasliquid two phase flow using VOF method. I came across a method to calculate the interfacial area recently, and I'm very interesting in it. According this method, the local interfacial area in an interfacial cell is calculated from the cell fluid fraction gradient, Ai = grad fi * Vi where, Ai is the interfacial area of cell i, grad fi is the fluid fraction gradient of cell i, Vi is the volume of cell i. Could anybody tell me how to access the value of grad f in Fluent. Thanks a lot 

September 23, 2012, 01:17 

#2 
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 154
Rep Power: 10 
What type of flow regime you working with?


September 23, 2012, 02:01 

#3 
New Member
Join Date: Nov 2010
Posts: 12
Rep Power: 8 
Hi, kbaker
I'm working with a Tshaped mixing zone, the computational domain is 3D. The two inlets are for gas and liquid respectively. I need to calculate the interfacial area of the main channel. Can you help with that? thanks 

September 23, 2012, 03:05 

#4 
Senior Member
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 154
Rep Power: 10 
Do you have any paper about what are you trying to do? if you have send it to my email khalidb77@gmail.com its better to understand your problem well?


September 25, 2012, 11:17 

#5 
Senior Member
shoeb khan
Join Date: Nov 2011
Posts: 179
Rep Power: 7 
use
C_VOF(c,t) in udf to acess that parameter that parameter that you want to know shk 

September 25, 2012, 21:03 

#6 
New Member
Join Date: Nov 2010
Posts: 12
Rep Power: 8 
thanks shk
C_VOF(c,t) returns the volume fraction for cell c, however how can I calculate the gradient of C_VOF(c,t)? 

October 6, 2012, 00:01 

#7  
New Member
jie
Join Date: Oct 2012
Posts: 1
Rep Power: 0 
Quote:
Haven't you solved the problem? If you haven't, you can try the "C_VOF_G". Additionally, could you explain the meaning of equation"Ai = grad fi * Vi "? Last edited by pointh; October 6, 2012 at 02:49. 

October 12, 2012, 21:09 

#8 
New Member
Join Date: Nov 2010
Posts: 12
Rep Power: 8 
Thank you pointh,
I'll try your method. And I can't figure out this equation neither. sorry. 

December 13, 2012, 16:28 

#9 
New Member
Chaudhary
Join Date: Dec 2012
Location: Pakistan
Posts: 8
Rep Power: 6 
i want to calculate area of circles which would be used in ansys fluent ....
it is 2d heat exchanger and i have problem how to calculate area of circle in front of flow or which area i have to put in reference value .. i have confusion whether i have to use area of 2 or 4 circles ??? kindly tell me how to calculate this area or which area i have to put in reference value ??? i have attached the jpeg. file of structure to further explain it ? waiting for answer...i will be very thankful to you. what Reference values should I used in fluent to find the area as defaults values are 1 for area,depth and length. Area=? Depth=? 

June 24, 2017, 09:50 

#10 
New Member
bosi
Join Date: Feb 2016
Posts: 3
Rep Power: 3 
I want to calculate the interfacial area in Fluent between two fluids, I am using the VOF model and I am mixing the two fluids in static mixer and I need a way to calculate the interfacial area. Could anyone help me!


Thread Tools  
Display Modes  


Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
VOF Interfacial Area  2D/3D Reconstruction Method  Greg Perkins  Main CFD Forum  2  September 10, 2012 04:05 
CFX Solver Memory Error  mike  CFX  1  March 19, 2008 08:22 
How to calculate the cell area  Le  FLUENT  0  February 18, 2007 23:15 
Calculate volumetric interfacial area  summer  FLUENT  0  June 14, 2006 11:46 
how to calculate the area of a boundary in UDF?  peter  FLUENT  0  December 9, 2005 01:42 