solve the mixing of gases

 Register Blogs Members List Search Today's Posts Mark Forums Read

 May 7, 2008, 05:05 solve the mixing of gases #1 Prashant Guest   Posts: n/a Hi All, I am new to Fluent. I have a problem in solving the below problem. I have a two chambers A and B. B area is 50 times larger than the A. |---------| |----| | | A | B | |----| | | | |---------| The condition of the gas is Gas A----2.05 bar, 400 K Gas B----2.00 bar, 300 K I initialise the 2.00 bar, and 300 K and patching zone A with 2.05 bar,400 K. but the problem is It TAKES TEMPERATURE VALUES CORRECTLY BUT PRESSURE, IT SHOWS DIFFERENT VALUES. First thought it might be problem with operating pressure. and tryed changing it to zero gauge pressure. then also the same problem ( pressure difference is different) Please, help me to solve this problem. Regards, Prashant

 May 7, 2008, 05:07 Re: solve the mixing of gases #2 Prashant Guest   Posts: n/a In the above the figure is not shown correctly. The A and B chambers are side by side A | B

 May 8, 2008, 02:20 Re: solve the mixing of gases #3 CFD Guest   Posts: n/a First Initialize Default values and patch each zone carefully,and check the pressure in each zone at initial conditions and how do you sepparate both zones (boundary condition)?

 May 8, 2008, 15:42 Re: solve the mixing of gases #4 AAA Guest   Posts: n/a Hi maybe the problem is not setup correctly. What BCs are you using? Are you using unsteady simulation? What results are you trying to obtain? Something that might be of help, go to Report-->Reference values and check the pressure there. Regards AAA

 May 21, 2008, 00:51 Re: solve the mixing of gases #5 Prashant Guest   Posts: n/a sorry, I have seperated the zones using interior BC in GAMBIT itself. So, when imported it will create two zones. And the A and B chambers are closed. So all the outside walls are given the temperature BC. But, whn I initialised the values it assumes only 1.01325 bar as the pressure, u give whatever the values. Refernce value is set zero. And When I tryed to patch the values. the max value is taken as : 1.01325 + patch, min : 1.01325 - patch, for whole geometry. But, the temperature values is whatever the value has been patched. I want to simulate the A is at 2.05 bar n 400 K, B is at 2.00 bar n 300 K. by looking at the problem it seems simple. I am new to FLUENT. But, don't know how to solve this one. If anybody know, please let me know. Thanks in Advance pshant

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post ahad FLUENT 0 December 31, 2006 04:09 prakash FLUENT 0 September 7, 2006 00:53 Jay Nelson Main CFD Forum 0 June 14, 2005 18:29 Thaony A. FLUENT 0 July 1, 2004 14:04 Shankar FLUENT 0 June 24, 2003 13:25

All times are GMT -4. The time now is 02:16.