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Modeling a gas flow in the arcing chamber of high voltage circuit breaker
Posted May 12, 2010, 3:06 a.m. EDT 1 Reply
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Hi!
I need to simulate a gas flow based on Euler equations.
The feature of this problem is that the chamber includes the nozzle, which accelerates the flow from subsonic to supersonic condition. Due to this the Reynolds number is very high.
In Model Library there is no such example, just models based on Navier-Stokes, but all of them are for low Reynolds numbers.
My questions are:
- Where can I get any examples of the flow based on Euler equations in 2D?
- I know I can use PDE mode, but its rather difficult to set the subdomain and boundary conditions for me. How can I do it for Euler equations? How can I set Euler equations in PDE mode? Any examples?
Thanks in advance.
I need to simulate a gas flow based on Euler equations.
The feature of this problem is that the chamber includes the nozzle, which accelerates the flow from subsonic to supersonic condition. Due to this the Reynolds number is very high.
In Model Library there is no such example, just models based on Navier-Stokes, but all of them are for low Reynolds numbers.
My questions are:
- Where can I get any examples of the flow based on Euler equations in 2D?
- I know I can use PDE mode, but its rather difficult to set the subdomain and boundary conditions for me. How can I do it for Euler equations? How can I set Euler equations in PDE mode? Any examples?
Thanks in advance.
1 Reply Last Post May 12, 2010, 5:45 a.m. EDT
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Posted:
1 decade ago
I think the reason why you see no example is that gas dynamic equations are VERY difficult to resolve numerically, specially with sonic transition. I dont think comsol solver can resolve them at the moment. But in principle you can try writting the pde ans see what happen..
I will be curious to see the results
my guess is that you wont get a solution
I f you look at the cfd module presentation somewhere on the comsol site, [ due in June ] you will see that euler equations are planned but ONLY for a future release.. so just being patient is another option you have.. :-)
JF
I will be curious to see the results
my guess is that you wont get a solution
I f you look at the cfd module presentation somewhere on the comsol site, [ due in June ] you will see that euler equations are planned but ONLY for a future release.. so just being patient is another option you have.. :-)
JF