problem in simulating porous drying process

benson621 · December 7, 2011, 07:29

i am using fluent to simulate a air drying process of a piece of cotton.
i have tried to simulate the whole setup with a fan a some volume of area.
but my computer is too slow to calculate that huge amount of meshes.
so i decided to remove the large volume of air and the inlet, with only a thin layer of air, setting the air to be a constant high temperature, simulating the constant hot air flow around the cotton.

the water can be vaporized and come out to the thin layer of air, but now the problem is, the vapor accumulate in the layer of air. (i have tried pressure-oultet for the surface of the layer of air, but the rate of vaporizing water still slow down at the early state, so i think it fails)
in real case, the vapor should be carried away almost immediately by the air flow.

can it possible to set the condition as the vapor come out of the cotton, it disappear? or how can i set the vapor to get out of the air much faster?

thank you for paying attention to my problem.
and sorry for my poor english

benson621 · December 8, 2011, 12:54

do anyone know please tell me please.

thank you so much!!!

Bubble O · December 13, 2011, 04:57

Hi benson 621,

A couple of months ago I had to deal with an evaporation problem. But it was ink printed on web. Could you send me your fluent file so that I can have a look at your problem?

my email: davidmanuel1201@hotmail.com

Do not give up. Fluent is like women

benson621 · December 13, 2011, 06:33

Quote:

Originally Posted by Bubble O

Hi benson 621,

A couple of months ago I had to deal with an evaporation problem. But it was ink printed on web. Could you send me your fluent file so that I can have a look at your problem?

my email: davidmanuel1201@hotmail.com

Do not give up. Fluent is like women

thank you for your response.
i am new in ansys fluent.
which part of the file you need, i think it is not possible to send you the whole project file, right?
should i save as some specific format, so that it is small but contain enough data for you to go through my case ?

Bubble O · December 13, 2011, 06:56

Just send me the files you need to run the model on fluent.

benson621 · December 13, 2011, 12:37

Quote:

Originally Posted by Bubble O

Just send me the files you need to run the model on fluent.

i have already sent to your email (davidmanuel1201@hotmail.com),
can u receive it? coz my email seems to have some problem, i am not sure if the email was sent out or not actually

Bubble O · December 13, 2011, 12:42

I got it. I will check it soon.. keep in touch

benson621 · December 16, 2011, 15:59

Quote:

Originally Posted by Bubble O

I got it. I will check it soon.. keep in touch

can u figure out how u make it ?

December 7, 2011, 07:29	problem in simulating porous drying process	#1
benson621 New Member Join Date: Oct 2011 Posts: 14 Rep Power: 15	i am using fluent to simulate a air drying process of a piece of cotton. i have tried to simulate the whole setup with a fan a some volume of area. but my computer is too slow to calculate that huge amount of meshes. so i decided to remove the large volume of air and the inlet, with only a thin layer of air, setting the air to be a constant high temperature, simulating the constant hot air flow around the cotton. the water can be vaporized and come out to the thin layer of air, but now the problem is, the vapor accumulate in the layer of air. (i have tried pressure-oultet for the surface of the layer of air, but the rate of vaporizing water still slow down at the early state, so i think it fails) in real case, the vapor should be carried away almost immediately by the air flow. can it possible to set the condition as the vapor come out of the cotton, it disappear? or how can i set the vapor to get out of the air much faster? thank you for paying attention to my problem. and sorry for my poor english

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Problem in defining porous region on an imported tetrahedral mesh	run_cfd	OpenFOAM Pre-Processing	0	May 24, 2011 03:15
Porous media solving problem	mulfal	OpenFOAM Running, Solving & CFD	2	June 23, 2010 06:31
problem about droplets in porous	cck	Siemens	0	August 6, 2005 01:48
Modeling drying in porous media	Oliver	Main CFD Forum	0	January 14, 2005 12:41
POROUS SURFACE MESHING PROBLEM	subramani.j	Siemens	1	March 3, 2004 05:45

December 8, 2011, 12:54		#2
benson621 New Member Join Date: Oct 2011 Posts: 14 Rep Power: 15	do anyone know please tell me please. thank you so much!!!

December 13, 2011, 04:57		#3
Bubble O New Member David Abrantes Join Date: Dec 2011 Posts: 4 Rep Power: 15	Hi benson 621, A couple of months ago I had to deal with an evaporation problem. But it was ink printed on web. Could you send me your fluent file so that I can have a look at your problem? my email: davidmanuel1201@hotmail.com Do not give up. Fluent is like women

December 13, 2011, 06:56		#5
Bubble O New Member David Abrantes Join Date: Dec 2011 Posts: 4 Rep Power: 15	Just send me the files you need to run the model on fluent.

December 13, 2011, 12:42		#7
Bubble O New Member David Abrantes Join Date: Dec 2011 Posts: 4 Rep Power: 15	I got it. I will check it soon.. keep in touch