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need time until 60 s, but already error in 2 s (courant number) |
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December 31, 2013, 18:44 |
need time until 60 s, but already error in 2 s (courant number)
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#1 |
New Member
stefanus tobing
Join Date: Oct 2013
Posts: 19
Rep Power: 12 |
hi, in my case, I want to fill the tub until it is full with water in 2D. if I use time step size low = 0,1; number of time step = 100; auto save every(time step) = 10
i need time until 60 s, until the tub is full but in interation (before the tub is full) i got error message in 2 s, . the tub is not full yet what things should i change? ps: error "Global courant number is greater than 250.00 The velocity field is probably diverging. Please check the solution and reduce the time-step if necessary." thanks alot, if you can help me, this now. global courant number.jpg |
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December 31, 2013, 21:08 |
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#2 |
New Member
stefanus tobing
Join Date: Oct 2013
Posts: 19
Rep Power: 12 |
please any one can help me.. i will be very grateful to you
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January 1, 2014, 06:41 |
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#3 | |
Senior Member
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Hi,
Well i think you are using a larger time step, so try running with a smaller time step in combination with more inner iterations. Save the solution at each time step. How did you selected your current time step? I would calculate the local timestep using the relation Time = Distance / Velocity, that would be in your case the height of the water level to achieve and the water flow velocity. Quote:
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January 1, 2014, 11:00 |
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#4 | ||
New Member
stefanus tobing
Join Date: Oct 2013
Posts: 19
Rep Power: 12 |
thank you so much, has reply me
Quote:
now i set time step size low = 0,01; number of time step = 100; auto save every(time step) = 5 and iteration = 200. is it good combination? i'm sorry, i don't know how. i just use default setting, and set the time like i said before. Quote:
i select it from "calculation activities" or "monitors"? please explain to me thanks so much |
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January 2, 2014, 13:40 |
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#5 |
New Member
stefanus tobing
Join Date: Oct 2013
Posts: 19
Rep Power: 12 |
taxalian, i've solved the problem now,
thank you so much |
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