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-   -   rotating Domain, interpase problem (http://www.cfd-online.com/Forums/cfx/21724-rotating-domain-interpase-problem.html)

carlos October 20, 2005 12:20

rotating Domain, interpase problem
 
Hi guys, Im simulating the rotor of a wind-power-plant. My last simulations all terminated with errors, because there is coming a strong vortex in the whole body. This vortex is in the wrong direction of the normal wake-vortex by wind-power-plants. In the beginning of the Solver-run, the vortex is very small but after ten iterations he is rising very fast. It is a three-blade-rotor, so Im simulating only 120 degrees in a rotating Domain.The symmetrie-planes are connected with an interphase (Periodic,rotational,GGI).The round Plane which connects the symmetrie-planes ist a free-slip-Wall. It seems as if the symmetrie Planes wont work right, but I made a lot of simulations like this an they work. So if anybody can help I will be very greateful.


Glenn Horrocks October 20, 2005 18:43

Re: rotating Domain, interpase problem
 
Hi,

The problem is probably in your setup. Are you using periodic boundaries at the ends of the 120 degree segment? What are your entry and exit conditions?

Glenn Horrocks

Carlos October 21, 2005 04:25

Re: rotating Domain, interpase problem
 
The two sidewalls with the 120 degree angle to each other are connected as Interphase:periodic connection method: GGI periodicy: rotational

The entry is an inlet Frame type: stationary normal speed: 10 m/s

The exit is an outlet (I also tried opening) with relative pressure 0 Pa


Glenn Horrocks October 23, 2005 18:17

Re: rotating Domain, interpase problem
 
Hi,

What do you mean by "The round Plane which connects the symmetrie-planes ist a free-slip-Wall"? Do you mean the outer radius of the domain is a free-slip wall?

Glenn Horrocks


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