INTRODUCTION

        The aim of this hands-on is the study of Rayleigh-Benard instabilities between two plates (the description of the problem will be done more precisely later) using a simulating tool such as Fluent.
We will start with a general presentation of the physical problem, then we will present the models used with Fluent to simulate this phenomenon. Moreover, we will test the influence of the mesh on the results (comparing the critical Rayleigh numbers obtained with different kinds of mesh, as well as the visualisations of the flow) and also the influence of the numerical schemes, considering first and second order schemes and comparing SIMPLE and SIMPLEC schemes. At last, we will see few trials about the multigrid method.