Hi guys, I´m 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 I´m 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 won´t work right, but I made a lot of simulations like this an they work. So if anybody can help I will be very greateful.

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

The two sidewalls with the 120 degree angle to each other are connected as Interphaseeriodic 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

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