velocity inlet with time related change of the magnitude

mobby90 · January 13, 2015, 05:42

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
Pete

ICyzzle · January 14, 2015, 08:17

Hey,

just use field functions as velocity inlet.

ICy

sabrina · February 4, 2015, 05:38

Quote:

Originally Posted by ICyzzle

Hey,

just use field functions as velocity inlet.

ICy

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

January 13, 2015, 05:42	velocity inlet with time related change of the magnitude	#1
mobby90 New Member Pete Join Date: Jan 2015 Posts: 1 Rep Power: 0	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 Pete

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January 14, 2015, 08:17		#2
ICyzzle New Member Join Date: Dec 2014 Posts: 4 Rep Power: 11	Hey, just use field functions as velocity inlet. ICy