This paper introduces a lot of situations about the Computational Fluid Dy-namics (CFD) analysis of backward facing step flows. The main point of this paper is incompressible flow in a backward step, measured by drivers and Seegmiller experiments.
The researchers concluded that validation parameters chosen for the study are the locations of the surface hydrostatic pressure and the reattachment compres-sion impact downstream of the step. The surface static pressures predicted by WIND using a two-equation SST turbulence model are shown below. This fig-ure includes a comparison of earlier versions of NPARC and WIND with exper-imental data. The WIND code slightly overestimates the surface pressure drop from the free flow value to about 5% of the corner value of the separation area (base pressure). This may be due to the fact that the transition point is experi-mentally unknown and not accurately predicted by the natural transition of the turbulence model. However, this over-forecasting predicts the previous pressure drop closer to the experimental results than the AEDC PARC, TUFF, and GASP codes using the Baldwin Lomax, KE, and Cebeci, and Smith models, respective-ly. The rest of the forecast for WIND pressure is in good agreement with the forecast pressure.
ثابت حسان ثابت | Thabit Hassan Thabit | 17389