problem with FFT in fluent 12

galapago · April 8, 2010, 18:24

i´m working in a typical fluid around cylinder simulation. i put 3 velocity monitors, run the simulation and then i try to make a fft plot, but show an error "Process_and_Plot: Negative time-step! do-plot: No data points in range.". i dont know why this happened.

another problem, when i click in LOAD INPUT FILE the file where it's supossed that the monitors are, is empty. then i clik in FILES OF TYPE and then ALL FILES, only in this way the monitors appear.
can somebody help me?
thaks a lot in advance

Maxmum · June 4, 2010, 17:52

Quote:

Originally Posted by galapago

i´m working in a typical fluid around cylinder simulation. i put 3 velocity monitors, run the simulation and then i try to make a fft plot, but show an error "Process_and_Plot: Negative time-step! do-plot: No data points in range.". i dont know why this happened.

another problem, when i click in LOAD INPUT FILE the file where it's supossed that the monitors are, is empty. then i clik in FILES OF TYPE and then ALL FILES, only in this way the monitors appear.
can somebody help me?
thaks a lot in advance

i confront the first problem too

pcc · July 2, 2019, 19:52

Hello, did anybody find the solution?

April 8, 2010, 18:24	problem with FFT in fluent 12	#1
galapago New Member omar Join Date: Apr 2010 Posts: 23 Rep Power: 14	i´m working in a typical fluid around cylinder simulation. i put 3 velocity monitors, run the simulation and then i try to make a fft plot, but show an error "Process_and_Plot: Negative time-step! do-plot: No data points in range.". i dont know why this happened. another problem, when i click in LOAD INPUT FILE the file where it's supossed that the monitors are, is empty. then i clik in FILES OF TYPE and then ALL FILES, only in this way the monitors appear. can somebody help me? thaks a lot in advance

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July 2, 2019, 19:52		#3
pcc New Member Priscilla Join Date: Jul 2019 Posts: 1 Rep Power: 0	Hello, did anybody find the solution?