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Mehdi Naderi (mnader4)
Member
Username: mnader4

Post Number: 17
Registered: 12-2006
Posted on Wednesday, May 09, 2007 - 04:35 pm:   

Hi Mr. Nelson,
I was wondering if you answering my question.
Tintegral calculates time integral of a variable.
My program calculates the variable for entire geometry.
If I want to use Tintegral of a variable (scalar) in a specific point in my geometry, how can I use time integral?
When we use tintegral on our geometry, which point of tintegral will Fpde give us as an output?

Sincerely,
Mehdi
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Robert G. Nelson (rgnelson)
Moderator
Username: rgnelson

Post Number: 847
Registered: 06-2003
Posted on Wednesday, May 09, 2007 - 05:49 pm:   

TINTEGRAL is a scalar operator. It requires a scalar argument. If you want to pick a point out of your domain at which to compute the integral, use
TINTEGRAL(VAL(<expression>,<x>,<y>))

If you give TINTEGRAL an argument that requires a position, such as TINTEGRAL(VAR1), you will get the value at the last location that was specified in the cascade of evaluations - in other words, a random position.

If you want to integrate an entire field, declare a new variable and give it the equation
DT(newvar)=<expression>

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