3d vof

Smaras · February 19, 2013, 06:03

Hello,

Need help

I am getting this problem with the 3D VOF (air jet impinging over water). The simulation is good till 1.4e-2s but after that it gives the following error. The time step size i am using is 1e-6 with 40 time steps. The setting are as follows:

1. Double with SST
2. Surface tension 0.073 n/m
3. inlet velocity 96.672 m/s
4. PISO Scheme with VF(Mod HRIC) Momentum (2nd ord)
5. URF Pressure 0.3 Density 0.5 Body Forces 1 VF 0.5

In 2D for the same thing, i had mass loss problem but i was able to find the solution with the help of few people here.

Would be thankful for your kind reply.

Regards,
Smaras

===>>>>turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 240257 cells
# Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps!

Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: vof-1
Divergence detected in AMG solver: x-momentum
Divergence detected in AMG solver: y-momentum
Divergence detected in AMG solver: z-momentum
Divergence detected in AMG solver: vof-1
turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 251038 cells

Primitive Error at Node 0: floating point exception

Primitive Error at Node 1: floating point exception

Primitive Error at Node 2: floating point exception

Primitive Error at Node 3: floating point exception

Primitive Error at Node 4: floating point exception

Primitive Error at Node 5: floating point exception<<<<====

Smaras · February 19, 2013, 06:15

Forgotten the show the geometry. Its the same for 3D case
(PS the line below on left is not axis its nozzle wall)

Smaras · February 19, 2013, 07:58

Any one please i need help on this quickly

February 19, 2013, 06:03	3d vof	#1
Smaras Member Smaras Join Date: Sep 2012 Location: Germany Posts: 78 Rep Power: 14	Hello, Need help I am getting this problem with the 3D VOF (air jet impinging over water). The simulation is good till 1.4e-2s but after that it gives the following error. The time step size i am using is 1e-6 with 40 time steps. The setting are as follows: 1. Double with SST 2. Surface tension 0.073 n/m 3. inlet velocity 96.672 m/s 4. PISO Scheme with VF(Mod HRIC) Momentum (2nd ord) 5. URF Pressure 0.3 Density 0.5 Body Forces 1 VF 0.5 In 2D for the same thing, i had mass loss problem but i was able to find the solution with the help of few people here. Would be thankful for your kind reply. Regards, Smaras ===>>>>turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 240257 cells # Divergence detected in AMG solver: x-momentum -> Increasing relaxation sweeps! Divergence detected in AMG solver: x-momentum Divergence detected in AMG solver: y-momentum Divergence detected in AMG solver: z-momentum Divergence detected in AMG solver: vof-1 Divergence detected in AMG solver: x-momentum Divergence detected in AMG solver: y-momentum Divergence detected in AMG solver: z-momentum Divergence detected in AMG solver: vof-1 Divergence detected in AMG solver: x-momentum Divergence detected in AMG solver: y-momentum Divergence detected in AMG solver: z-momentum Divergence detected in AMG solver: vof-1 Divergence detected in AMG solver: x-momentum Divergence detected in AMG solver: y-momentum Divergence detected in AMG solver: z-momentum Divergence detected in AMG solver: vof-1 Divergence detected in AMG solver: x-momentum Divergence detected in AMG solver: y-momentum Divergence detected in AMG solver: z-momentum Divergence detected in AMG solver: vof-1 Divergence detected in AMG solver: x-momentum Divergence detected in AMG solver: y-momentum Divergence detected in AMG solver: z-momentum Divergence detected in AMG solver: vof-1 turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 251038 cells Primitive Error at Node 0: floating point exception Primitive Error at Node 1: floating point exception Primitive Error at Node 2: floating point exception Primitive Error at Node 3: floating point exception Primitive Error at Node 4: floating point exception Primitive Error at Node 5: floating point exception<<<<====

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February 19, 2013, 06:15		#2
Smaras Member Smaras Join Date: Sep 2012 Location: Germany Posts: 78 Rep Power: 14	Forgotten the show the geometry. Its the same for 3D case (PS the line below on left is not axis its nozzle wall)

February 19, 2013, 07:58		#3
Smaras Member Smaras Join Date: Sep 2012 Location: Germany Posts: 78 Rep Power: 14	Any one please i need help on this quickly