1.   Presentation.

   The main target of this study is to handle the fluid dynamic code Star CD. The tutorial takes the exemple of a two-dimensional flow in a labyrinth. The labyrinth consists of a space enclosed by walls with one inlet, one outlet and four baffles (zero-thickness solid cells). The fluid within the labyrinth is air and its physical properties are :
Molecular viscosity
Pa s
Specific heat
J/kg K
Thermal conductivity
W/m K

Air at standard pressure and temperature (1 bar and 293K) enters the labyrinth with a velocity of 0.02 cm/s in the laminar case and of 2 m/s in the turbulent case. The total mass entering the labyrinth exists through the outlet. The flow is assumed to be two-dimensional, with constant fluid density, viscosity and temperature in the third part of the study. The influence of temperature is studied in the fourth part of this report.

   Go to next page