We propose a new numerical method based on the usual incompressible scheme which is taking into account the density variation to realize the turbulent heat transfer prediction accurately. For the assessment of the applicability of this method for the flow field where the compressibility is not negligible even in the case of low Mach number, the direct numerical simulations (DNS) of turbulent flow in a horizontal channel of different wall temperatures are carried out by using the numerical method and the results for the turbulent flow under some conditions of unstable stratification are compared. By the 4-quadrant analysis of turbulent shear stress, it is found that the ejection events in the vicinity of the walls are particularly affected by the density variation. In addition, the global balance of the temperature profile are also affected. The results suggest that the present method is potent in simulating the change in heat transfer rate due to density fluctuation in more practical flow fields.
Skip Nav Destination
ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4274-6
PROCEEDINGS PAPER
DNS of Turbulent Channel Flow With Density Variation Under Some Conditions of Unstable Stratification
Takashi Ohta,
Takashi Ohta
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Kazuki Nakamura,
Kazuki Nakamura
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Kazuhiko Mizobata,
Kazuhiko Mizobata
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Takeo Kajishima
Takeo Kajishima
Osaka University, Suita, Osaka, Japan
Search for other works by this author on:
Takashi Ohta
Osaka University, Suita, Osaka, Japan
Kazuki Nakamura
Osaka University, Suita, Osaka, Japan
Kazuhiko Mizobata
Osaka University, Suita, Osaka, Japan
Takeo Kajishima
Osaka University, Suita, Osaka, Japan
Paper No:
HT2007-32061, pp. 187-193; 7 pages
Published Online:
August 24, 2009
Citation
Ohta, T, Nakamura, K, Mizobata, K, & Kajishima, T. "DNS of Turbulent Channel Flow With Density Variation Under Some Conditions of Unstable Stratification." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 187-193. ASME. https://doi.org/10.1115/HT2007-32061
Download citation file:
5
Views
Related Proceedings Papers
Related Articles
Compressibility and Variable Density Effects in Turbulent Boundary layers
J. Heat Transfer (April,2007)
Simulation of Compressible Micro-Scale Jet Impingement Heat Transfer
J. Heat Transfer (June,2003)
Supersonic Flow Calculations Using a Reynolds-Stress and a Thermal Eddy Diffusivity Turbulence Model
J. Fluids Eng (September,1994)
Related Chapters
Natural Gas Transmission
Pipeline Design & Construction: A Practical Approach, Third Edition
Introduction
Introduction to Finite Element, Boundary Element, and Meshless Methods: With Applications to Heat Transfer and Fluid Flow
Extended Surfaces
Thermal Management of Microelectronic Equipment