Fan interfaces can simulate the pressure increase across the surface as a constant value or one that varies as a function of volumetric flow rate. It is also possible to model the swirling motion of the fluid downstream from the fan. Fan interfaces approximate the overall flow change because of the presence of the fan, but they do not provide a detailed description of the flow across the fan. Fan interfaces are a good option when you want to simulate the pressure jump and swirling effects of a fan located within the model without using the actual fan geometry. If the two-dimensional representation of the fan interface does not provide enough realism, use an internal fan to simulate the fan effects on an actual 3D part in your model. For more information, see About Internal Fans. If your fan is located at a domain boundary and swirling effects are not important, you can add a fan boundary to define an intake or exhaust fan. For more information, see About Fan Boundary Conditions. | |||||||||