simulation stopped

BAssem.at · October 28, 2013, 02:32

Dear all,
i have simulation stopped with this error message:
Preprocessor Messages:
convective flux exceeded stability limit
at t= 2.9323E-02 cycle= 1 iter= 1 delt= 2.9323E-02 mesh block 1
restarting cycle with smaller time step

convection failure diagnostics
time, cycle, delt, iter = 2.9323E-02 1 2.9323E-02 1
maximum failure ratio = 5.74337E+00 is in x-coordinate direction
at cell ( 458, 33, 2) mesh block 1

i j k u v w p f tn nf
afr afb aft vf

458, 33, 1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
(old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00
458, 32, 2 7.7217E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.1827E+00
(old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1
1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00
457, 33, 2 7.4346E+00 0.0000E+00 -1.8974E-01 1.1682E+04 1.1205E+00
(old) 0.0000E+00 0.0000E+00 0.0000E+00 5.1670E+04 1.0000E+00 0.0000E+00 0
1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00
458, 33, 2 7.7217E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.1827E+00
(old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1
1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00
459, 33, 2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9284E-01
(old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 8
1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00
458, 34, 2 7.7217E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.1827E+00
(old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1
1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00
458, 33, 3 7.3374E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.0000E+00
(old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1
1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00

============= mentor tip ===============
persistent f-packing location at t= 0.11645E+00
x= 0.64725E+01, y= 0.23108E-01, z= 0.21000E+01
i= 421, j= 2, k= 47
f= 0.97129E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.16183E+00
x= 0.64725E+01, y= 0.27960E+01, z= 0.21000E+01
i= 421, j= 62, k= 47
f= 0.97633E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.17752E+00
x= 0.64725E+01, y= 0.28422E+01, z= 0.21000E+01
i= 421, j= 63, k= 47
f= 0.97733E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.20453E+00
x= 0.64725E+01, y= 0.53147E+00, z= 0.21000E+01
i= 421, j= 13, k= 47
f= 0.97911E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.23177E+00
x= 0.64725E+01, y= 0.48526E+00, z= 0.21000E+01
i= 421, j= 12, k= 47
f= 0.97972E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.26053E+00
x= 0.64725E+01, y= 0.43904E+00, z= 0.21000E+01
i= 421, j= 11, k= 47
f= 0.98040E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.36301E+00
x= 0.64725E+01, y= 0.57769E+00, z= 0.21000E+01
i= 421, j= 14, k= 47
f= 0.98599E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.45597E+00
x= 0.64725E+01, y= 0.27960E+01, z= 0.21000E+01
i= 421, j= 62, k= 47
f= 0.98883E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.59428E+00
x= 0.64725E+01, y= 0.27498E+01, z= 0.21000E+01
i= 421, j= 61, k= 47
f= 0.98957E+00
========================================

recommend reducing cfpk by factor of 10

============= mentor tip ===============
persistent f-packing location at t= 0.67306E+00
x= 0.64725E+01, y= 0.27498E+01, z= 0.21000E+01
i= 421, j= 61, k= 47
f= 0.98984E+00
========================================

recommend reducing cfpk by factor of 10

can someone explain to me this message.
many thanks!
Bassem.

October 28, 2013, 02:32	simulation stopped	#1
BAssem.at New Member Athmani Bassem Join Date: Dec 2011 Posts: 14 Rep Power: 14	Dear all, i have simulation stopped with this error message: Preprocessor Messages: convective flux exceeded stability limit at t= 2.9323E-02 cycle= 1 iter= 1 delt= 2.9323E-02 mesh block 1 restarting cycle with smaller time step convection failure diagnostics time, cycle, delt, iter = 2.9323E-02 1 2.9323E-02 1 maximum failure ratio = 5.74337E+00 is in x-coordinate direction at cell ( 458, 33, 2) mesh block 1 i j k u v w p f tn nf afr afb aft vf 458, 33, 1 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 (old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 458, 32, 2 7.7217E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.1827E+00 (old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1 1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00 457, 33, 2 7.4346E+00 0.0000E+00 -1.8974E-01 1.1682E+04 1.1205E+00 (old) 0.0000E+00 0.0000E+00 0.0000E+00 5.1670E+04 1.0000E+00 0.0000E+00 0 1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00 458, 33, 2 7.7217E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.1827E+00 (old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1 1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00 459, 33, 2 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9284E-01 (old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 8 1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00 458, 34, 2 7.7217E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.1827E+00 (old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1 1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00 458, 33, 3 7.3374E+00 0.0000E+00 -2.8766E-01 0.0000E+00 1.0000E+00 (old) 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 9.9959E-01 0.0000E+00 1 1.0000E+00 1.0000E+00 1.0000E+00 1.0000E+00 ============= mentor tip =============== persistent f-packing location at t= 0.11645E+00 x= 0.64725E+01, y= 0.23108E-01, z= 0.21000E+01 i= 421, j= 2, k= 47 f= 0.97129E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.16183E+00 x= 0.64725E+01, y= 0.27960E+01, z= 0.21000E+01 i= 421, j= 62, k= 47 f= 0.97633E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.17752E+00 x= 0.64725E+01, y= 0.28422E+01, z= 0.21000E+01 i= 421, j= 63, k= 47 f= 0.97733E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.20453E+00 x= 0.64725E+01, y= 0.53147E+00, z= 0.21000E+01 i= 421, j= 13, k= 47 f= 0.97911E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.23177E+00 x= 0.64725E+01, y= 0.48526E+00, z= 0.21000E+01 i= 421, j= 12, k= 47 f= 0.97972E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.26053E+00 x= 0.64725E+01, y= 0.43904E+00, z= 0.21000E+01 i= 421, j= 11, k= 47 f= 0.98040E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.36301E+00 x= 0.64725E+01, y= 0.57769E+00, z= 0.21000E+01 i= 421, j= 14, k= 47 f= 0.98599E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.45597E+00 x= 0.64725E+01, y= 0.27960E+01, z= 0.21000E+01 i= 421, j= 62, k= 47 f= 0.98883E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.59428E+00 x= 0.64725E+01, y= 0.27498E+01, z= 0.21000E+01 i= 421, j= 61, k= 47 f= 0.98957E+00 ======================================== recommend reducing cfpk by factor of 10 ============= mentor tip =============== persistent f-packing location at t= 0.67306E+00 x= 0.64725E+01, y= 0.27498E+01, z= 0.21000E+01 i= 421, j= 61, k= 47 f= 0.98984E+00 ======================================== recommend reducing cfpk by factor of 10 can someone explain to me this message. many thanks! Bassem. Last edited by BAssem.at; October 29, 2013 at 04:35.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Solar Radiation in OpenFOAM	plainstyle	OpenFOAM Running, Solving & CFD	15	July 8, 2014 04:43
Simulation of a complex wing in solidworks flow simulation	niels1900	FloEFD, FloWorks & FloTHERM	6	April 20, 2011 10:44
GUI crash and simulation engine still running	RPJones	FLOW-3D	2	November 9, 2010 08:18
velocity profile export from a simulation onto another	sudhirlv	STAR-CCM+	1	September 12, 2010 18:57
strange simulation error	Ralf Schmidt	FLUENT	2	May 4, 2007 13:02