Loading...

Numerical investigation of effect of aspect ratio of rectangular nozzles

Faghani, E ; Sharif University of Technology | 2008

787 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/THETA.2008.5167188
  3. Publisher: 2008
  4. Abstract:
  5. In this research the fluid and thermal characteristics of a rectangular turbulent jet flow is studied numerically. The results of three dimensional jet issued from a rectangular nozzle are presented. A numerical method employing control volume approach with collocated grid arrangement was employed. Velocity and pressure fields are coupled with SIMPLEC algorithm. The turbulent stresses are approximated using k-e model with two different inlet conditions. The velocity and temperature fields are presented and the rates of their decay at jet centerline are noted. The velocity vectors of a main flow and secondary flow are illustrated. Also effect of aspect ratio on mixing in rectangular cross section jets is considered. Investigated aspect ratio was among 1:1 to 1:4. The results showed that the jet entrains more with smaller AR. Special attention has been drawn on the influence of the Reynolds number (based on hydraulic diameter) as well as the inflow conditions on the evolution of the rectangular jet. An influence on the jet evolution is found for smaller Re, but the jet is close to a converged state for higher Reynolds numbers. The influence of the inflow conditions on the jet characteristics is so strong. Copyright © 2008 IEEE
  6. Keywords:
  7. Centerlines ; Collocated grids ; Control volumes ; E-Model ; Hydraulic diameter ; Inflow conditions ; Inlet conditions ; Numerical investigations ; Pressure field ; Rectangular cross-sections ; Rectangular jet ; Rectangular nozzle ; SIMPLEC algorithm ; Temperature field ; Thermal characteristics ; Turbulent jet ; Turbulent stress ; Velocity vectors ; Aspect ratio ; Nozzles ; Pressure drop ; Reynolds number ; Semiconductor quantum dots ; Three dimensional ; Jets
  8. Source: 2008 2nd International Conference on Thermal Issues in Emerging Technologies, ThETA 2008, Cairo, 17 December 2008 through 20 December 2008 ; July , 2008 , Pages 391-398 ; 9781424435777 (ISBN)
  9. URL: https://ieeexplore.ieee.org/document/5167188