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How to extract right- and left-moving waves

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Old   May 17, 2006, 06:17
Default How to extract right- and left-moving waves
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Steve
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This is a post-pro question, so may be OT here. However...

If I have a 1D section of a model and full access to transient time-based results for all the relevant information (pressure, velocity, temperature, etc), how can I extract left-travelling and right-travelling pressure waves? To make things worse, the system is by no means linear.

Any references or explanations welcome.
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Old   May 22, 2006, 04:24
Default Re: How to extract right- and left-moving waves
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Lionel Larcheveque
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Hello,

You could try to compute frequency-wavenumber spectra. If the waves contain enough energy copmared to other unsteady events, they should be seen in opposite f-k half-planes as curves whose shapes is related to the dispersion relation. See Larcheveque et al. JFM 516, pp. 265-301 for an example with a plane pressure wave (sorry for the shameless self-citation).

Hope this helps,

Lionel
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