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Stop condition
Posted Dec 18, 2009, 3:12 a.m. EST 1 Reply
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I have done 1D model. It ia trsnsient phenomeon, I gave some initialisation values for variables and I have run it many times the cycle, each tine the end results of last cycle is used as the initial condition. I need to stop solving when I am getting almost identail cycles. I am watching it when it it reaching steady state and I am I neeed to stop solution when it is steady state.
For eg. T (x)for a cycle = T(x) for the previous cycle.
It will be highly appreciated, if any one can answer this.
I know it is possible by specifying the stop condition in Sover Parameter /Time stepping Window.
But how to specify this stop condition? If I type Expression: T(t)-T(t-tp)-.01, where tp is the time perod of each cycle, it says "Unkown function".
How to specify T(t)? I mean Temp at a time t?
Ramadas
For eg. T (x)for a cycle = T(x) for the previous cycle.
It will be highly appreciated, if any one can answer this.
I know it is possible by specifying the stop condition in Sover Parameter /Time stepping Window.
But how to specify this stop condition? If I type Expression: T(t)-T(t-tp)-.01, where tp is the time perod of each cycle, it says "Unkown function".
How to specify T(t)? I mean Temp at a time t?
Ramadas
1 Reply Last Post Dec 18, 2009, 7:05 p.m. EST
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Posted:
1 decade ago
I have done 1D model. It ia trsnsient phenomeon, I gave some initialisation values for variables and I have run it many times the cycle, each tine the end results of last cycle is used as the initial condition. I need to stop solving when I am getting almost identail cycles. I am watching it when it it reaching steady state and I am I neeed to stop solution when it is steady state.
For eg. T (x)for a cycle = T(x) for the previous cycle.
It will be highly appreciated, if any one can answer this.
I know it is possible by specifying the stop condition in Sover Parameter /Time stepping Window.
But how to specify this stop condition? If I type Expression: T(t)-T(t-tp)-.01, where tp is the time perod of each cycle, it says "Unkown function".
How to specify T(t)? I mean Temp at a time t?
Ramadas
For eg. T (x)for a cycle = T(x) for the previous cycle.
It will be highly appreciated, if any one can answer this.
I know it is possible by specifying the stop condition in Sover Parameter /Time stepping Window.
But how to specify this stop condition? If I type Expression: T(t)-T(t-tp)-.01, where tp is the time perod of each cycle, it says "Unkown function".
How to specify T(t)? I mean Temp at a time t?
Ramadas