Numerical investigation of corner angle and wing number effects on fluid flow characteristics of a turbulent stellar jet

Details Numerical investigation of corner angle and wing number effects on fluid flow characteristics of a turbulent stellar jet Numerical investigation of corner angle and wing number effects on fluid flow characteristics of a turbulent stellar jet

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009hmt....46...25f&link_type=abstract

Heat and Mass Transfer, Volume 46, Issue 1, pp.25-37

Physics

Fluid Dynamics

3

Scientific paper

In this research the fluid dynamics characteristics of a stellar turbulent jet flow is studied numerically and the results of three dimensional jet issued from a stellar nozzle are presented. A numerical method based on control volume approach with collocated grid arrangement is employed. The turbulent stresses are approximated using k- ɛ and k- ω models with four different inlet conditions. The velocity field is presented and the rate of decay at jet centerline is noted. Special attention is drawn on the influence of corner angle and number of wings on mixing in stellar cross section jets. Stellar jets with three; four and five wings and 15-65° corner angles are studied. Also the effect of Reynolds number (based on hydraulic diameter) as well as the inflow conditions on the evolution of the stellar jet is studied. The Numerical results show that the jet entrains more with corner angle 65° and five wings number. The jet is close to a converged state for high Reynolds numbers. Also the influence of the inflow conditions on the jet characteristics is so strong.

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