Inlet

June 6, 2006, 07:19

Hi! I want to model an input which lasts just a minute but I want my simulation to last 5 minutes to see the effect of the input. So my input follows a step function. How can I introduce this in CFX? Thank you!

June 6, 2006, 09:22

Search for "step" in the CFX Pre manual.

June 6, 2006, 09:35

I am not sure if this would work, but no harm in giving this a try.

Define a "User Function" you can specify the values of the input at t=0, t=1min as the magnitude of Step t=1.01min magnitude=0 Toggle on the "Extend Max" checkbox.

You will then need to define a user expression that incorporates this user function.

The above procedure should work if time is allowed as an argument in User Function

June 6, 2006, 07:19	Inlet	#1
yolanda Guest Posts: n/a	Hi! I want to model an input which lasts just a minute but I want my simulation to last 5 minutes to see the effect of the input. So my input follows a step function. How can I introduce this in CFX? Thank you!

June 6, 2006, 09:22	Re: Inlet	#2
Joe Guest Posts: n/a	Search for "step" in the CFX Pre manual.

June 6, 2006, 09:35	Re: Inlet	#3
hagupta Guest Posts: n/a	I am not sure if this would work, but no harm in giving this a try. Define a "User Function" you can specify the values of the input at t=0, t=1min as the magnitude of Step t=1.01min magnitude=0 Toggle on the "Extend Max" checkbox. You will then need to define a user expression that incorporates this user function. The above procedure should work if time is allowed as an argument in User Function

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