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Time step size??

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Old   March 26, 2014, 07:26
Default Time step size??
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N S Akshay
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I have an unsteady flow over a cavity. I want to capture lower frequencies of the the oscillations of a cavity. my simulation is taking a lot of time as my time step size now is 10 ^-7. therefore when i perform a fft I am only able to get higher frequencies when plotting sound pressure level vs frequencies. Can i reduce my time step size and still get accurate results?
Mach no-2
first length-0.005.
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