Help! How to get the gradient of void fraction?

summer · December 3, 2009, 11:42

Hello, I use Eulerian multiphase model in FLUENT (version 6. 3.33)and tried to get the gradient of the void fraction. I found someone had the same problem before and tried his method:
if (NULL != THREAD_STORAGE(thread,SV_VOF_G))
{v_s = C_VOF_G(cell, thread)[0];}
But it did not work!!!!!!!!!!! I checked the THREAD_STORAGE, it is always == NULL.
Does anyone have some idea how to get it? Any suggestion is appreciated.

motahar · May 20, 2011, 03:34

Hi friends,
I'm simulating a tube with water flow.
The tube encounters boiling near the wall.
I intend to calculate 'void fraction versus enthalpy' along the channel.
Can you help me how to calculate void fraction?

I'm in an emergency condition.
Waiting for your comments!!!

Thanks Everybody

December 3, 2009, 11:42	Help! How to get the gradient of void fraction?	#1
summer New Member Xia Join Date: Mar 2009 Location: Columbus, Ohio Posts: 5 Rep Power: 17	Hello, I use Eulerian multiphase model in FLUENT (version 6. 3.33)and tried to get the gradient of the void fraction. I found someone had the same problem before and tried his method: if (NULL != THREAD_STORAGE(thread,SV_VOF_G)) {v_s = C_VOF_G(cell, thread)[0];} But it did not work!!!!!!!!!!! I checked the THREAD_STORAGE, it is always == NULL. Does anyone have some idea how to get it? Any suggestion is appreciated.

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May 20, 2011, 03:34		#2
motahar New Member M. A. Join Date: Jul 2010 Posts: 27 Rep Power: 15	Hi friends, I'm simulating a tube with water flow. The tube encounters boiling near the wall. I intend to calculate 'void fraction versus enthalpy' along the channel. Can you help me how to calculate void fraction? I'm in an emergency condition. Waiting for your comments!!! Thanks Everybody