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Is it possible to split the simulation into two steps?

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Old   May 16, 2022, 22:40
Default Is it possible to split the simulation into two steps?
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Junyeol
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Dear forum users,
I want to split the simulation into two steps so that those two steps are connected.

If I simply want the value of the pressure gain to change, I can change the input flow rate, but what I want to do is change the boundary condition of the surface according to the steps. (eg, Outlet>>Wall)

Is it possible to change the boundary condition according to the stage while the two stages are fluidly connected?.

Thank you for your help as always.
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Old   May 17, 2022, 03:14
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Glenn Horrocks
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Can you explain what you are trying to do more?

Pressure gain of what?
What change to the boundary condition do you want to do? What do you mean by steps?

Quote:
Is it possible to change the boundary condition according to the stage while the two stages are fluidly connected?.
What do you mean by "stage"?

Please show a diagram of what you want to do.
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Old   May 17, 2022, 03:31
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Quote:
Originally Posted by ghorrocks View Post
Can you explain what you are trying to do more?

Pressure gain of what?
What change to the boundary condition do you want to do? What do you mean by steps?



What do you mean by "stage"?

Please show a diagram of what you want to do.

My English is not good enough. Sorry.


To state the simulation that I want to do ultimately, I want to cut off the flow of the part where the flow passed during the experiment.

So, I wonder if it is possible to transform the part set as an outlet into a wall at a specific time.
Therefore, in the first case where one wall is an outlet, and in the second case where one wall becomes a wall after proceeding in the first case, I wonder if a divided analysis in this way is possible.

Thank you always.
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Old   May 17, 2022, 03:45
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I do not quite understand what you are trying to do, but it is simple to change a boundary condition type (maybe a wall to an outlet) by stopping the simulation, editing the boundary in CFX-Pre to the new boundary condition type, and then restarting the simulation using the first simulation as an initial condition.

This will use the flow from the first boundary condition setup and the initial condition for the second boundary condition. Is this what you want to do?
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Old   May 17, 2022, 03:57
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Quote:
Originally Posted by ghorrocks View Post
I do not quite understand what you are trying to do, but it is simple to change a boundary condition type (maybe a wall to an outlet) by stopping the simulation, editing the boundary in CFX-Pre to the new boundary condition type, and then restarting the simulation using the first simulation as an initial condition.

This will use the flow from the first boundary condition setup and the initial condition for the second boundary condition. Is this what you want to do?
That method seems to fit the simulation I want to do. I'll give it a try. thank you.
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