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UDF sine wave

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Old   March 22, 2005, 14:20
Default UDF sine wave
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enda
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I am simulating a horn with a pres inlet with a half sine wave and a pressure outlet at atmospheric pressure, aft of the mouth. I am monitoring the pressure levels at the mouth but instead of the pressure dissipating after a few micro secs, I am finding that new waves are "creating" themseleves in the horn. I expect a certain amount of this due to standing waves etc. but not to this extent. Does anyone have any ideas?
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