# Simulation stops at Starting time loop

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 March 11, 2018, 18:13 Simulation stops at Starting time loop #1 New Member   Jonathan Maverick Join Date: Mar 2018 Posts: 2 Rep Power: 0 Hey guys. So, I'm a begginer at OpenFoam and I'm trying simulate the flow in a de Laval nozzle but when I try to use rhoCentralFoam it just stops at the message of starting time loop, like so: Code: ```Create time Create mesh for time = 0 Reading thermophysical properties Selecting thermodynamics package { type hePsiThermo; mixture pureMixture; transport const; thermo hConst; equationOfState perfectGas; specie specie; energy sensibleInternalEnergy; } Reading field U Creating turbulence model Selecting turbulence model type laminar Selecting laminar stress model Stokes fluxScheme: Kurganov Starting time loop``` What could be causing it and how can I fix it? Code: ```BlockMeshDict convertToMeters 0.001; vertices ( (0 0 -0.5) // 0 (20.96 0 -0.5) // 1 (86.82 0 -0.5) // 2 (0 18.1 -0.5) // 3 (20.96 6 -0.5) // 4 (86.82 20 -0.5) // 5 (0 0 0.5) // 6 (20.96 0 0.5) // 7 (86.82 0 0.5) // 8 (0 18.1 0.5) // 9 (20.96 6 0.5) // 10 (86.82 20 0.5) // 11 ); edges ( ); blocks ( hex (7 6 9 10 1 0 3 4) // 0 (10 10 1) simpleGrading (1 1 1) hex (8 7 10 11 2 1 4 5) // 1 (10 10 1) simpleGrading (1 1 1) ); boundary ( inlet { type patch; faces ( (6 0 3 9) ); } bottom { type symmetryPlane; faces ( (6 0 1 7) (7 1 2 8) ); } outlet { type patch; faces ( (8 2 5 11) ); } top { type wall; faces ( (3 9 10 4) (4 10 11 5) ); } ); mergePatchPairs ( );``` Code: ```ControlDict application rhoCentralFoam; startFrom latestTime; startTime 0; stopAt endTime; endTime 1; deltaT 0.00000001; writeControl adjustableRunTime; writeInterval 0.001; purgeWrite 0; writeFormat ascii; writePrecision 6; writeCompression off; timeFormat general; timePrecision 6; runTimeModifiable true; adjustTimeStep yes; maxCo 0.1; maxDeltaT 1;``` Code: ```p dimensions [1 -1 -2 0 0 0 0]; internalField uniform 6895000; boundaryField { inlet { type totalPressure; p0 uniform 6895000; gamma 1.133; value \$internalField; } outlet { type fixedValue; value uniform 101325; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Code: ```T dimensions [0 0 0 1 0 0 0]; internalField uniform 1722; boundaryField { inlet { type fixedValue; value uniform 1722; } outlet { type zeroGradient; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Code: ```U Dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 0 0); boundaryField { inlet { type pressureInletVelocity; value uniform (0 0 0); } outlet { type zeroGradient; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Thanks in advance!

March 12, 2018, 09:16
#2
Senior Member

M Sereez
Join Date: Jan 2014
Location: England
Posts: 352
Blog Entries: 1
Rep Power: 13
Quote:
 Originally Posted by JMaverick93 Hey guys. So, I'm a begginer at OpenFoam and I'm trying simulate the flow in a de Laval nozzle but when I try to use rhoCentralFoam it just stops at the message of starting time loop, like so: Code: ```Create time Create mesh for time = 0 Reading thermophysical properties Selecting thermodynamics package { type hePsiThermo; mixture pureMixture; transport const; thermo hConst; equationOfState perfectGas; specie specie; energy sensibleInternalEnergy; } Reading field U Creating turbulence model Selecting turbulence model type laminar Selecting laminar stress model Stokes fluxScheme: Kurganov Starting time loop``` What could be causing it and how can I fix it? Code: ```BlockMeshDict convertToMeters 0.001; vertices ( (0 0 -0.5) // 0 (20.96 0 -0.5) // 1 (86.82 0 -0.5) // 2 (0 18.1 -0.5) // 3 (20.96 6 -0.5) // 4 (86.82 20 -0.5) // 5 (0 0 0.5) // 6 (20.96 0 0.5) // 7 (86.82 0 0.5) // 8 (0 18.1 0.5) // 9 (20.96 6 0.5) // 10 (86.82 20 0.5) // 11 ); edges ( ); blocks ( hex (7 6 9 10 1 0 3 4) // 0 (10 10 1) simpleGrading (1 1 1) hex (8 7 10 11 2 1 4 5) // 1 (10 10 1) simpleGrading (1 1 1) ); boundary ( inlet { type patch; faces ( (6 0 3 9) ); } bottom { type symmetryPlane; faces ( (6 0 1 7) (7 1 2 8) ); } outlet { type patch; faces ( (8 2 5 11) ); } top { type wall; faces ( (3 9 10 4) (4 10 11 5) ); } ); mergePatchPairs ( );``` Code: ```ControlDict application rhoCentralFoam; startFrom latestTime; startTime 0; stopAt endTime; endTime 1; deltaT 0.00000001; writeControl adjustableRunTime; writeInterval 0.001; purgeWrite 0; writeFormat ascii; writePrecision 6; writeCompression off; timeFormat general; timePrecision 6; runTimeModifiable true; adjustTimeStep yes; maxCo 0.1; maxDeltaT 1;``` Code: ```p dimensions [1 -1 -2 0 0 0 0]; internalField uniform 6895000; boundaryField { inlet { type totalPressure; p0 uniform 6895000; gamma 1.133; value \$internalField; } outlet { type fixedValue; value uniform 101325; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Code: ```T dimensions [0 0 0 1 0 0 0]; internalField uniform 1722; boundaryField { inlet { type fixedValue; value uniform 1722; } outlet { type zeroGradient; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Code: ```U Dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 0 0); boundaryField { inlet { type pressureInletVelocity; value uniform (0 0 0); } outlet { type zeroGradient; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Thanks in advance!
maxDeltaT = 1 (change)

 March 12, 2018, 09:56 #3 New Member   Jonathan Maverick Join Date: Mar 2018 Posts: 2 Rep Power: 0 Hello shereez234, thanks for replying! Change to what exactly? I've already tried to run with a differente value (0.001) but the results were the same.

March 18, 2018, 06:08
#4
Senior Member

harshawardhank
Join Date: Mar 2014
Posts: 209
Rep Power: 13
Quote:
 Originally Posted by JMaverick93 Hey guys. So, I'm a begginer at OpenFoam and I'm trying simulate the flow in a de Laval nozzle but when I try to use rhoCentralFoam it just stops at the message of starting time loop, like so: Code: ```Create time Create mesh for time = 0 Reading thermophysical properties Selecting thermodynamics package { type hePsiThermo; mixture pureMixture; transport const; thermo hConst; equationOfState perfectGas; specie specie; energy sensibleInternalEnergy; } Reading field U Creating turbulence model Selecting turbulence model type laminar Selecting laminar stress model Stokes fluxScheme: Kurganov Starting time loop``` What could be causing it and how can I fix it? Code: ```BlockMeshDict convertToMeters 0.001; vertices ( (0 0 -0.5) // 0 (20.96 0 -0.5) // 1 (86.82 0 -0.5) // 2 (0 18.1 -0.5) // 3 (20.96 6 -0.5) // 4 (86.82 20 -0.5) // 5 (0 0 0.5) // 6 (20.96 0 0.5) // 7 (86.82 0 0.5) // 8 (0 18.1 0.5) // 9 (20.96 6 0.5) // 10 (86.82 20 0.5) // 11 ); edges ( ); blocks ( hex (7 6 9 10 1 0 3 4) // 0 (10 10 1) simpleGrading (1 1 1) hex (8 7 10 11 2 1 4 5) // 1 (10 10 1) simpleGrading (1 1 1) ); boundary ( inlet { type patch; faces ( (6 0 3 9) ); } bottom { type symmetryPlane; faces ( (6 0 1 7) (7 1 2 8) ); } outlet { type patch; faces ( (8 2 5 11) ); } top { type wall; faces ( (3 9 10 4) (4 10 11 5) ); } ); mergePatchPairs ( );``` Code: ```ControlDict application rhoCentralFoam; startFrom latestTime; startTime 0; stopAt endTime; endTime 1; deltaT 0.00000001; writeControl adjustableRunTime; writeInterval 0.001; purgeWrite 0; writeFormat ascii; writePrecision 6; writeCompression off; timeFormat general; timePrecision 6; runTimeModifiable true; adjustTimeStep yes; maxCo 0.1; maxDeltaT 1;``` Code: ```p dimensions [1 -1 -2 0 0 0 0]; internalField uniform 6895000; boundaryField { inlet { type totalPressure; p0 uniform 6895000; gamma 1.133; value \$internalField; } outlet { type fixedValue; value uniform 101325; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Code: ```T dimensions [0 0 0 1 0 0 0]; internalField uniform 1722; boundaryField { inlet { type fixedValue; value uniform 1722; } outlet { type zeroGradient; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Code: ```U Dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 0 0); boundaryField { inlet { type pressureInletVelocity; value uniform (0 0 0); } outlet { type zeroGradient; } bottom { type symmetryPlane; } top { type zeroGradient; } defaultFaces { type empty; } }``` Thanks in advance!
This case is working on my machine

 Tags nozzle, openfoam, rhocentralfoam