Getting the value of a variable at time zero

JuPa · November 6, 2017, 13:01

Let's say I define a new variable called Poo.

The value of Poo varies from cell to cell.

Then let's say I do a transient simulation.

Is there any way I can use the value of Poo at time = 0 s?

I'm trying to implement an expression such as

Poo2 = Poo@t=0s - Poo@current_time

Implementing Poo@current_time is a piece of cake. Implementing Poo@t=0s is challenging!

evcelica · November 6, 2017, 15:34

Wouldn't you know Poo @ 0s since it is a constant?

If the initial value is from a steady state run, You could then export the Poo variable everywhere, and then import it in CFX Pre as a 3D function (x,y,z,Poo).
Now Poo2 = Poo(x,y,z) - Poo@current_time.

Couldn't you have chosen a different variable name?

November 6, 2017, 13:01	Getting the value of a variable at time zero	#1
JuPa Senior Member Mr CFD Join Date: Jun 2012 Location: Britain Posts: 361 Rep Power: 14	Let's say I define a new variable called Poo. The value of Poo varies from cell to cell. Then let's say I do a transient simulation. Is there any way I can use the value of Poo at time = 0 s? I'm trying to implement an expression such as Poo2 = Poo@t=0s - Poo@current_time Implementing Poo@current_time is a piece of cake. Implementing Poo@t=0s is challenging!

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November 6, 2017, 15:34		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	Wouldn't you know Poo @ 0s since it is a constant? If the initial value is from a steady state run, You could then export the Poo variable everywhere, and then import it in CFX Pre as a 3D function (x,y,z,Poo). Now Poo2 = Poo(x,y,z) - Poo@current_time. Couldn't you have chosen a different variable name?