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velocity inlet with time related change of the magnitude

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Old   January 13, 2015, 04:42
Question velocity inlet with time related change of the magnitude
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Pete
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Hey all,

I'm a architectural engineering student and we started with a basic course in CFD during this semester.

Now I would need some advice how to realize a velocity inlet with time related change of the magnitude. The aim is to simulate the start-up of a ventilator. Because if I work with constant velocity, the stationary change runs with sonic speed. But I want to simulate the real start-up condition of the ventilator.

So my idea was something like a ramp increase of the velocity inlet of the ventilator. But I don't know how to realize it.

BR
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Old   January 14, 2015, 07:17
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Hey,

just use field functions as velocity inlet.

ICy
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Old   February 4, 2015, 04:38
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sabrina bina
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Quote:
Originally Posted by ICyzzle View Post
Hey,

just use field functions as velocity inlet.

ICy
and if we want calculate the velocity sleep in knudsen layer ?
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