what is the difference between timestep and interval?

dada1204 · November 9, 2010, 21:40

I am doing a coal combustion project,but it is hard to ensure convergence ,the cfx help tells that if you are running High Res and are having convergence difficulty, try reducing your timestep.I don't know what does the timestep mean.
I hope somebody can tell me .Thank you.

Claudia · November 10, 2010, 04:14

You have to reduce your timescale in the solver options. If it is set to automatic you have to change it to physical timescale and then make it smaller.

bharath · November 10, 2010, 11:33

am also doing same kind of project.first try your simulation with ideal gas(with out coal combustion or heat transfer) and check the convergence first.if it is converging well then there is no problem with the mesh and try to do the simulation step by step and not whole things in single simulation.

November 9, 2010, 21:40	what is the difference between timestep and interval?	#1
dada1204 New Member Join Date: Oct 2010 Posts: 18 Rep Power: 15	I am doing a coal combustion project,but it is hard to ensure convergence ,the cfx help tells that if you are running High Res and are having convergence difficulty, try reducing your timestep.I don't know what does the timestep mean. I hope somebody can tell me .Thank you.

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November 10, 2010, 04:14		#2
Claudia Member Join Date: Mar 2009 Posts: 38 Rep Power: 17	You have to reduce your timescale in the solver options. If it is set to automatic you have to change it to physical timescale and then make it smaller.

November 10, 2010, 11:33		#3
bharath Senior Member Bharath kumar Join Date: Apr 2009 Posts: 169 Rep Power: 17	am also doing same kind of project.first try your simulation with ideal gas(with out coal combustion or heat transfer) and check the convergence first.if it is converging well then there is no problem with the mesh and try to do the simulation step by step and not whole things in single simulation.