Thermodynamic correction of numerical diffusion in WCSPH method
<p>The SPH method has been used successfully for the numerical simulation of hydrodynamic flows. CEDEX has developed its own SPH model, SPHERIMENTAL for quasi-compressible flow, with which several studies of calibration have been performed. Problems of numerical diffusion have been observed in...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | Spanish |
| Published: |
Universitat Politècnica de València
2015-01-01
|
| Series: | Ingeniería del Agua |
| Subjects: | |
| Online Access: | http://polipapers.upv.es/index.php/IA/article/view/3140 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | <p>The SPH method has been used successfully for the numerical simulation of hydrodynamic flows. CEDEX has developed its own SPH model, SPHERIMENTAL for quasi-compressible flow, with which several studies of calibration have been performed. Problems of numerical diffusion have been observed in simulations of variable transient regime, which increase the entropy of the system and damp the movement of the fluid. It has been used a dambreak test case (Lobovsky, 2013) in which this effect has been noted. It is necessary to take care of the boundary conditions, the correct spatial discretization of the fluid and to use a suitable turbulence model to obtain an accurate numerical simulation, but even so, excessive energy dissipation occurs. The causes of this problem have been analyzed in this paper, and a correction is proposed.</p> |
|---|---|
| ISSN: | 1134-2196 1886-4996 |