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January 3, 2011, 02:13 |
fluent define limiting time
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#1 |
New Member
ekkapong
Join Date: Oct 2010
Posts: 18
Rep Power: 15 |
Dear all
please give me your suggestion about how to set fluent simulation for limiting time. for example I have model as shown upper figure. fluid inlet: 1.8 m/s, 588 k fin that is surrounded by fluid: 273 k teperature outlet: outflow the fluid will transfer the heat to the fin. I'd like to use CFD postprocessing(temperature contour) after 20 second. please help me |
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January 3, 2011, 03:10 |
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#2 |
New Member
ekkapong
Join Date: Oct 2010
Posts: 18
Rep Power: 15 |
Can I set time to Transient on General settings and set the Run calculation as following:
Time step size(s)=1 number of time steps= 20 max Iterations/TIme step= 10 Could anyone give me your suggestion that it is correct or not? please |
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January 3, 2011, 22:07 |
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#3 |
Senior Member
Real Name :)
Join Date: Jan 2010
Location: United States
Posts: 192
Rep Power: 16 |
Nuengao,
Your approach is correct. The final time of the simulation will be: N* Where N is the number of time steps and is the time step size. Typically, having a transient simulation converge (per time step) in 5-7 iterations is reasonably good, thus having a setting of a maximum of 10 iterations per time step is OK. However, in your case I would be concerned about the size of the time step -- ensure that the simulation is actually converging after 10 iterations, not simply marching to the next time step because of the maximum iteration count you've imposed. Regards, ComputerGuy |
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