The paper provides a view of some developments and a perspective on the future role of the Reynolds-averaged Navier-Stokes (RANS) approach in the computation of turbulent flows and heat transfer in competition with large-eddy simulations (LES). It is argued that RANS will further play an important role, especially in industrial and environmental computations, and that the further increase in the computing power will be used more to utilize advanced RANS models to shorten the design and marketing cycle rather than to yield the way to LES. We also discuss some current and future developments in RANS aimed at improving their performance and range of applicability, as well as their potential in hybrid approaches in combination with the LES strategy. Limitations in LES at high Reynolds (Re) and Rayleigh (Ra) number flows and heat transfer are revisited and some hybrid RANS/LES routes are discussed. The potential of very large eddy simulations (VLES) of flows dominated by (pseudo)-deterministic eddy structures, based on transient RANS (T-RANS) and similar approaches, is discussed and illustrated in an example of “ultra-hard” (very high Ra) thermal convection.
Skip Nav Destination
e-mail: hanjalic@ws.tn.tudeft.nl
Article navigation
September 2005
Special Section On Rans/Les/Des/Dns: The Future Prospects Of Turbulence Modeling
Will RANS Survive LES? A View of Perspectives
K. Hanjalic
K. Hanjalic
Thermal and Fluids Sciences, Department of Multi-scale Physics,
e-mail: hanjalic@ws.tn.tudeft.nl
Delft University of Technology
, Lorentzweg 1, 2628 CJ Delft, The Netherlands
Search for other works by this author on:
K. Hanjalic
Thermal and Fluids Sciences, Department of Multi-scale Physics,
Delft University of Technology
, Lorentzweg 1, 2628 CJ Delft, The Netherlandse-mail: hanjalic@ws.tn.tudeft.nl
J. Fluids Eng. Sep 2005, 127(5): 831-839 (9 pages)
Published Online: September 1, 2005
Citation
Hanjalic, K. (September 1, 2005). "Will RANS Survive LES? A View of Perspectives." ASME. J. Fluids Eng. September 2005; 127(5): 831–839. https://doi.org/10.1115/1.2037084
Download citation file:
Get Email Alerts
Experimental Investigation of the Effect of Rake on a Bluff Body Equipped With a Diffuser
J. Fluids Eng (April 2025)
Related Articles
Alternative LES and Hybrid RANS/LES for Turbulent Flows
J. Fluids Eng (December,2002)
A Methodology for Simulations of Complex Turbulent Flows
J. Fluids Eng (December,2002)
Large Eddy Simulation for Incompressible Flows: An Introduction. Scientific Computation Series
Appl. Mech. Rev (November,2002)
Numerical Simulations of Turbulent Mixing and Autoignition of Hydrogen Fuel at Reheat Combustor Operating Conditions
J. Eng. Gas Turbines Power (April,2012)
Related Proceedings Papers
Related Chapters
Two Advanced Methods
Applications of Mathematical Heat Transfer and Fluid Flow Models in Engineering and Medicine
Extended Surfaces
Thermal Management of Microelectronic Equipment, Second Edition
Extended Surfaces
Thermal Management of Microelectronic Equipment