Help:Pressure calculation in Fluent 6.3

fireman · October 28, 2010, 06:02

Hi, everybody

I am doing simulation of flame propagation in closed vessel using progress variable. The solver is density-based solver. When I use the explicit unsteady formulation, the pressure rise is reasonable. However, when I use the implicit unsteady formulation, the pressure increase rather slightly (almost no increasing), and the temperature became higher. Why this happens? Could anyone help me work out the problem? Thank you very much

fireman · November 2, 2010, 10:01

Can any one help me? By the way, I find that the mass conservation is not good, some mass has been lost.

What can I do?

Thanks.

October 28, 2010, 06:02	Help:Pressure calculation in Fluent 6.3	#1
fireman New Member Join Date: Mar 2009 Posts: 19 Rep Power: 17	Hi, everybody I am doing simulation of flame propagation in closed vessel using progress variable. The solver is density-based solver. When I use the explicit unsteady formulation, the pressure rise is reasonable. However, when I use the implicit unsteady formulation, the pressure increase rather slightly (almost no increasing), and the temperature became higher. Why this happens? Could anyone help me work out the problem? Thank you very much

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
ERROR: End AOA in airfoil table too small k 1 i 1 in Fluent 6.3	Asela	FLUENT	0	September 8, 2010 07:53
Error when starting Fluent 6.3 on Pc with lnia64 architecture	Julian K.	FLUENT	1	March 16, 2010 00:49
Problem in running fluent 6.3 (64 bit) on ubuntu 8.1 (64 bit)	Mir5	FLUENT	3	April 29, 2009 11:32
Fluent 6.3 on a Linux cluster	cfd_newbie	FLUENT	4	February 8, 2008 12:09
Warning 097-	AB	Siemens	6	November 15, 2004 05:41

November 2, 2010, 10:01		#2
fireman New Member Join Date: Mar 2009 Posts: 19 Rep Power: 17	Can any one help me? By the way, I find that the mass conservation is not good, some mass has been lost. What can I do? Thanks.