A computational model to study the stability characteristics of an evolving buoyant helium gas jet in ambient air environment is presented. Numerical formulation incorporates a segregated approach to solve for the transport equations of helium mass fraction coupled with the conservation equations of mixture mass and momentum using a staggered grid method. The operating parameters correspond to the Reynolds number varying from 30 to 300 to demarcate the flow dynamics in oscillating and non-oscillating regimes. Computed velocity and concentration fields were used to analyze the flow structure in the evolving jet. For Re = 300 case, results showed that an instability mode that sets in during the evolution process in Earth gravity is absent in zero gravity, signifying the importance of buoyancy. Though buoyancy initiates the instability, below a certain jet exit velocity, diffusion dominates the entrainment process to make the jet non-oscillatory as observed for the Re = 30 case. Initiation of the instability was found to be dependent on the interaction of buoyancy and momentum forces along the jet shear layer.
Skip Nav Destination
ASME 2004 Heat Transfer/Fluids Engineering Summer Conference
July 11–15, 2004
Charlotte, North Carolina, USA
Conference Sponsors:
- Heat Transfer Division and Fluids Engineering Division
ISBN:
0-7918-4691-1
PROCEEDINGS PAPER
Numerical Analysis of Flow Evolution in a Helium Jet Injected Into Ambient Air Available to Purchase
Rajani P. Satti,
Rajani P. Satti
University of Oklahoma, Norman, OK
Search for other works by this author on:
Ajay K. Agrawal
Ajay K. Agrawal
University of Oklahoma, Norman, OK
Search for other works by this author on:
Rajani P. Satti
University of Oklahoma, Norman, OK
Ajay K. Agrawal
University of Oklahoma, Norman, OK
Paper No:
HT-FED2004-56811, pp. 1267-1276; 10 pages
Published Online:
February 24, 2009
Citation
Satti, RP, & Agrawal, AK. "Numerical Analysis of Flow Evolution in a Helium Jet Injected Into Ambient Air." Proceedings of the ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. Volume 2, Parts A and B. Charlotte, North Carolina, USA. July 11–15, 2004. pp. 1267-1276. ASME. https://doi.org/10.1115/HT-FED2004-56811
Download citation file:
16
Views
Related Proceedings Papers
Effects of Buoyancy on Heat Transfer and Oxygen Consumption in Fuel-Thermal-Stability Studies
GT1994
Interfacial Dynamics of Two Layer Couette Flow: Gravity Enhanced Kelvin-Helmholtz Instability
FEDSM2005
Related Articles
Transient Analysis on the Onset of Thermal Instability in the Thermal Entrance Region of a Horizontal Parallel Plate Channel
J. Heat Transfer (May,1991)
Interfacial Instability
Appl. Mech. Rev (March,2003)
Related Chapters
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Effects on Non-Steady State Chloride Diffusion Coefficient with Numerical Method
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
The Special Characteristics of Closed-Cycle Gas Turbines
Closed-Cycle Gas Turbines: Operating Experience and Future Potential