# Laminar, transitional and turbulent flow

We simulate

- purely laminar flow
- transitional flow (e.g. using the k-kl-Omega turbulence model)
- fully developed turbulent flow

The results are a field of velocity vectors, pressures and pressure losses as well as forces and e.g. drag coefficients.

Steady state (time is treated as constant) and unsteady (temporal phenomena are resolved) simulations are possible for every model. When using the basic models passive tracers can be transported through the simulated geometry, residence times can be calculated as well as spatially and temporally resolved species concentrations yielded from the data.

One example for that is shown in the video below; a disc rotates in an enclosed space with a small air gap (like for example in a spin-coating process). Due to rotation and geometry a complex flow system forms, similar to the Taylor-Couette flow between cylinders. This influences things like heat transfer or the drying process in a spin coater. Another example where such patterns can occur are in centrifuges, where this can be critical for heating and cooling processes.