## Computing Pseudo-stationary and Time-dependent Convection

The structured mesh is better appropriate for computation of convection, the algorithm on the structured mesh is much more stable.
In this section the procedure on the unstructured mesh is explained, use it
only if you have a good reason to do so. For
operations on the structured mesh see tutorials Generating structured mesh in
complex geometries, and setting convection on structured mesh parameters.

Prerequisite for computing convection is that temperature has been computed before.
The computation can be time-consuming, and you usually have to change parameters
several times for approximating the real parameter values. This tutorial will
familiarize you with the procedure in general.

The following tasks are involved in computing convection: