Loading...
Search for:
developing-zone
0.011 seconds
Remarks on numerical prediction of wall shear stress in entry flow problems
, Article Communications in Numerical Methods in Engineering ; Volume 20, Issue 8 , 2004 , Pages 619-625 ; 10698299 (ISSN) ; Hosseinizadeh, S. F ; Sharif University of Technology
2004
Abstract
Today, commercial CFD codes are widely used to simulate many different entry flow problems. The flow in the developing zone undergoes a transition from a specified velocity profile at the inlet section to a fully developed profile in the region far from the inlet. Previous investigations have shown that the hydrodynamic variables, such as velocity and pressure magnitudes, along the centreline converge to a mesh independent solution even when coarse grid distributions are utilised. However, the present work shows that the local velocity profile is highly dependent on grid resolution in the vicinity of solid boundaries. It is shown that failure to account for the grid resolution can result in...
Experimental of Convective Heat Transfer Coefficient Around a Vertical Rod Bundle
, M.Sc. Thesis Sharif University of Technology ; Jafari, Jalil (Supervisor) ; Kazemzadeh Hannani, Siamak (Supervisor)
Abstract
Research on convective heat transfer coefficient around a rod bundle has several applications in industry. So far, many studies have been conducted in correlations related to internal fully developed flow. By comparing Dittus-Boelter, Sieder-Tate and Petukhov found to be more practical. The present study examines the validity of these frequently applied correlations experimentally. A thermohydraulic loop has been designed and manufactured to test and measuring the convective heat transfer coefficient. Due to its generalizibility, the unique geometry of this test facility (hexagonal arranged, 7 vertical rods in a hexagonal tube) has achieved extensive application. The major deviation factors...