HOMARD-Code_Saturne : Computational Fluid Dynamics

French version

Red ball Description

The first 3D test is run with the FATHER case. It simulates the thermal evolution after a junction between two pipes No error indicator is available in Code_Saturne for that modelisation; so a physical field is chosen to indicate the cells to split. For this case, the eddy energy seems to be suitable to follow the stream.
The initial global mesh is :

Maillage global

Refinement is located in the main pipe, immediately after the junction, where the eddy energy is high. On pictures, the interface between refined and non-refined zone can be seen in white.
Exemple resultat
 Exemple resultat 2

zoom resultat 2

This table presents the CPU time for one time step with Code_Saturne on each of the 5 successive meshes and the cost of the mesh adaptation by Homard. these results show that the cost of one adaptation is about 5% of the cost of a time-step resolution. Though, the built of a structure of the mesh raises time calculation for the first adaptation.

CPU time/CPUstep
Sequence #1 116 480 hexas 41.3s
1st adaptation 5.6s
Sequence #2 117544 hexas 46.0s
2nd adaptation 1.7s
Sequence #3 120790 hexas 40.7s
3rd adaptation 1.8s
Sequence #4 129374 hexas 43.8s
3th adaptation 1.9s
Sequence #5 131054 hexas44.6s

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