multiple species diffusion

sosat1012 · April 21, 2010, 07:13

I am using Ansys mechanical apdl (like the classical ansys before cfx and fluent become an ansys product). I am trying to simulate a multiple species diffusion. Inside a permeable (from one side) box that is surrounded by atmospheric air there is a source of CO2 and I want to find out the final concentrations of CO2, O2 and N2 inside the box (due to diffusion only not advection) when the system reaches equilibrium.

Is this possible? Does anyone know?

Sushil · September 10, 2011, 21:55

I am also looking for solution of this problem.Can someone come forward for help ?

papteo · November 23, 2011, 12:48

yes it is possible with fluent ! you can either use kinetic theory or the multicomponent option! there you can define the diffusion for the all gas pairs. Finally with a UDF you can read the desired diffusion_dara from the program!

April 21, 2010, 07:13	multiple species diffusion	#1
sosat1012 New Member Join Date: Apr 2010 Location: Athens, Greece Posts: 15 Rep Power: 16	I am using Ansys mechanical apdl (like the classical ansys before cfx and fluent become an ansys product). I am trying to simulate a multiple species diffusion. Inside a permeable (from one side) box that is surrounded by atmospheric air there is a source of CO2 and I want to find out the final concentrations of CO2, O2 and N2 inside the box (due to diffusion only not advection) when the system reaches equilibrium. Is this possible? Does anyone know? Sushil likes this.

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September 10, 2011, 21:55		#2
Sushil New Member Sushil Join Date: Oct 2009 Posts: 1 Rep Power: 0	I am also looking for solution of this problem.Can someone come forward for help ?

November 23, 2011, 12:48		#3
papteo Member Theodoros Papadopoulos Join Date: Mar 2011 Posts: 36 Rep Power: 15	yes it is possible with fluent ! you can either use kinetic theory or the multicomponent option! there you can define the diffusion for the all gas pairs. Finally with a UDF you can read the desired diffusion_dara from the program!