FOAM WARNING at time
hi foamers,
This warning is encountered during implementation. And the solution is diverging.:confused: //-------------- Courant Number mean: 4.89667e-05 max: 0.488398 deltaT = 1.06092e-56 --> FOAM Warning : From function Time::operator++() in file db/Time/Time.C at line 1010 Increased the timePrecision from 519 to 520 to distinguish between timeNames at time 0.209868 Time = 0.209868454511289076469537917546404059976339340209 9609375 //-------------------------------- How can I solved this warning. best regards |
hi dear vahid
deltaT = 1.06092e-56 is so little, so you should decrease your time step in controlDict to remove this warning. how much time do you want to simulate? (1 sec, 1 min, ....) however this little time step shows, some where your solver works wrong! i recommend to check up your BC or your implantation :) because with this small time step :), for and ordinary time it would take so so long time :) |
Indeed, this could be an indication that something is wrong with the BC like nimasam says. But it might also be that you started with a too big Courant number (~too big time step), this can create instabilities with extremely small time steps as a result. And last, it could also be caused by badly chosen initial conditions. Taking a small time step at the beginning of the run could correct for this.
Cheers, L |
hi
I'm modeling combustion with reactingFoam solver . i used to start the combustion from energy source in the energy equation at Specific time. After applying the energy source comes up warning. //-------------- energySource1 { type scalarExplicitSource; active true; timeStart 0.2; duration 0.05; selectionMode points; points ( (0.067 0.00035 -0.01) ); scalarExplicitSourceCoeffs { volumeMode absolute; injectionRate { hs 2; } } } //----------------------------------- best reagard |
i suggest to add source in several points instead of one point!, it may solves problem
|
thanks your reply
i did this work but it did not difference!!:confused: |
All times are GMT -4. The time now is 14:04. |