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-   -   Problems with sonicTurbFoam (http://www.cfd-online.com/Forums/openfoam-solving/60198-problems-sonicturbfoam.html)

tangd May 29, 2006 09:07

Now I'm going to solve a model
 
Now I'm going to solve a model by using sonicTurbFoam. Total pressure and the static temperature are known as the boundary conditions.

I set the boundary type "atmosphere" for the outlet so that I can get total pressure appeared. When I need to specify the temperature, I was confused about the inletValue and value. What's the difference actually between these two items? Here I chose the value field rather than inletValue. But when I ran it, I got the "time step continuity errors" mentioned by other users. Can anybody give me a hand to tell me what's the problem for that? The mesh should be ok, since it runs well with CFX. Thank you so much! The output message is:

Time = 1e-09

Mean and max Courant Numbers = 0 0
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
BICCG: Solving for Ux, Initial residual = 1, Final residual = 9.52594e-19, No Iterations 1
BICCG: Solving for Uy, Initial residual = 1, Final residual = 5.63869e-17, No Iterations 1
BICCG: Solving for Uz, Initial residual = 1, Final residual = 6.63028e-17, No Iterations 1
BICCG: Solving for h, Initial residual = 1, Final residual = 9.11021e-17, No Iterations 1
BICCG: Solving for p, Initial residual = 1, Final residual = 8.84444e-17, No Iterations 1
BICCG: Solving for p, Initial residual = 0.00176352, Final residual = 6.25931e-20, No Iterations 1
BICCG: Solving for p, Initial residual = 0.000495764, Final residual = 9.49008e-21, No Iterations 1
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 1.22391e-16, global = 6.2349e-17, cumulative = 6.2349e-17
BICCG: Solving for p, Initial residual = 0.000495685, Final residual = 9.48856e-21, No Iterations 1
BICCG: Solving for p, Initial residual = 0.000495764, Final residual = 9.49008e-21, No Iterations 1
BICCG: Solving for p, Initial residual = 0.000495685, Final residual = 9.48856e-21, No Iterations 1
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = 1.18589e-16, global = 5.76781e-17, cumulative = 1.20027e-16
BICCG: Solving for epsilon: solution singularity
bounding epsilon, min: 0 max: 0 average: 0
BICCG: Solving for k: solution singularity
bounding k, min: 0 max: 0 average: 0
ExecutionTime = 11.56 s ClockTime = 12 s

Time = 2e-09

Mean and max Courant Numbers = 1.54844e-15 2.0367e-11
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
BICCG: Solving for Ux: solution singularity
BICCG: Solving for Uy: solution singularity
BICCG: Solving for Uz: solution singularity
BICCG: Solving for h: solution singularity
BICCG: Solving for p: solution singularity
BICCG: Solving for p: solution singularity
BICCG: Solving for p: solution singularity
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = nan, global = nan, cumulative = nan
BICCG: Solving for p: solution singularity
BICCG: Solving for p: solution singularity
BICCG: Solving for p: solution singularity
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
time step continuity errors : sum local = nan, global = nan, cumulative = nan
BICCG: Solving for epsilon: solution singularity
BICCG: Solving for k: solution singularity
ExecutionTime = 26.71 s ClockTime = 27 s


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