This model demonstrates how the air path for a pusher fan can be modeled in KULI. The focus is on the high resistance of the hub, which influences the flow distribution. To take care of this effect, the air path is split in separate segments.
To model the high resistance of the hub, an equivalent area resistance located in the air path is modeled. Therefore the circular area of the hub must be converted in a rectangular area resistance. In our experience, the zeta value (dimensionless resistance) of the area resistance should be 3 times higher than the zeta value of the radiator next to the hub.
The air path is split into several segments. A part of the air mass flow passes the resistance, the rest flows by. Due to this uneven resistance characteristic, the resulting uneven air mass flow leads to a temperature distribution.Usable from release: KULI 9.1-0.01