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-   -   InterDymFoam FloatingObject Modification(Help!) (http://www.cfd-online.com/Forums/openfoam-solving/121619-interdymfoam-floatingobject-modification-help.html)

totalart August 1, 2013 09:57

InterDymFoam FloatingObject Modification(Help!)
 
Hi all,

I'm a beginner of OPENFOAM and trying to learn InterDymFoam modifying FloatingObject. Now I'm trying to set a case that an object is initially in the air and drops to water.

I have changed:
1. topoSetDict : location of box
box (0.35 0.35 0.54) (0.65 0.65 0.76);
2. setFieldsDict : initial free surface is level
box ( -100 -100 -100 ) ( 100 100 0.4 );

Calculation stops at about 0.3s. I've tried to reduce deltaT to 0.0001 but still stops at below. Post-processing results up to 0.2s look okay.
I didn't change much except above and deltaT, hence, writeControl is adjustableRunTime. Please advise what I should try. Thank you!!

Interface Courant Number mean: 0.0034416063622 max: 6.74414777876
Courant Number mean: 0.00989467176837 max: 6.74414777876
deltaT = 9.54914388697e-006
Time = 0.349705
Centre of mass: (0.49998781966 0.50001274756 0.227535688399)
Linear velocity: (-0.000159344840514 0.00016488321201 -0.541114919706)
Angular velocity: (0.000263342477032 -2.71499290814e-005 4.04946967898e-006)
GAMG: Solving for cellDisplacementx, Initial residual = 0.000521751846108, Fina
l residual = 9.10599745783e-006, No Iterations 4
GAMG: Solving for cellDisplacementy, Initial residual = 0.000489321994054, Fina
l residual = 8.72499674845e-006, No Iterations 4
GAMG: Solving for cellDisplacementz, Initial residual = 0.00063944853338, Final
residual = 5.03910294448e-006, No Iterations 5
Execution time for mesh.update() = 1.031 s
time step continuity errors : sum local = 0.000338450048206, global = -1.6928321
7593e-013, cumulative = -0.000389941435316
GAMGPCG: Solving for pcorr, Initial residual = 1, Final residual = 8.2383126360
8e-006, No Iterations 6
time step continuity errors : sum local = 0.00333300621618, global = -3.65868127
703e-009, cumulative = -0.000389945093997
MULES: Solving for alpha1
Phase-1 volume fraction = -1.17557007983e+290 Min(alpha1) = -8.6426155539e+294
Max(alpha1) = 2.58348481221e+294


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