hi,
To keep it simple time step size determines how fast or slow u progress in ur calculation.
Eg :- if time step size = 0.01 and number of time steps = 1000
at the end of ur simulation would have progressed 10 seconds in ur flow (1000*0.01).
hi,
To keep it simple time step size determines how fast or slow u progress in ur calculation.
Eg :- if time step size = 0.01 and number of time steps = 1000
at the end of ur simulation would have progressed 10 seconds in ur flow (1000*0.01).
HELLO BGARATH ,
Thanks for the answer it was very useful :D .
Regards
Fluent maual typically recommends that the ideal time step size would be one which yields convergence within 15-20 iterations.
more time steps are often required for the first time steps to converge
Dear raju ,
Can you explain if im simulating flow around naca air foil , what TSR i should use ?
Thanks salih and raju in advanced
Regards
Dear Salim,
You can try with small step size e.g. 0.01 or may be 0.001...then run the simulation for few iteration (may be around 20). Check the convergance. if it doesnt get converge then reduce further and if it converges, increase the time a bit and check again.
that's how you have to optimize the time step.
good luck
Ravi
HELLO Ravi , im using ansys 16.0 , Can you tell me how to change this TSR ?
can you send me the screen shot of Fluent in Ansys 16.o at [email protected] I will tell you how to change TSR.
Regards
Ravi
Dear Salim,
Advised to select small time-step size so that you can capture all the flow fluctuations. Set the limits that are appropriate for your simulation. Specify the upper and lower limits for the size of the time step. Smaller time step the computational expense may be too high.
Ashish
- Badges
- Science topic