Results 121 to 130 of about 3,296 (231)

Implementation of algebraic turbulent heat flux into Reynolds stress transport model and simulation of crossing tube bundles

Nuclear Engineering and Technology
Lead bismuth eutectic (LBE) is an excellent coolant for fast reactors, owing to its high boiling point and high thermal conductivity. Turbulent heat transfer is a complex phenomenon, and the numerical heat transfer of LBE is constrained by its extremely ...
Han Liu, Hao Sun, Binghuo Yan, Jun Chen, Zhikang Lin   +4 more
doaj   +1 more source

Role of Turbulent Prandtl Number on Heat Flux at Hypersonic Mach Numbers

, 2007
A new turbulence model suited for calculating the turbulent Prandtl number as part of the solution is presented. The model is based on a set of two equations: one governing the variance of the enthalpy and the other governing its dissipation rate.
Hassan, H. A., Edwards, J. R., Xiao, X., Gaffney, R. L., Jr.   +3 more
core  

Regimes of stratified turbulence at low Prandtl number

Journal of Fluid Mechanics
Quantifying transport by strongly stratified turbulence in low Prandtl number ( $Pr$ ) fluids is critically important for the development of better models for the structure and evolution of stellar and planetary interiors.
Kasturi Shah, Gregory P. Chini, Colm-cille P. Caulfield, Pascale Garaud   +3 more
openaire   +2 more sources

2-D NUMERICAL STUDY OF HEAT TRANSFER CROSSFLOW ON SINGLE CIRCULAR CYLINDER AND TANDEM WITH TURBULENT VISCOSITY MODIFICATION

Ethos: Jurnal Penelitian dan Pengabdian kepada Masyarakat, 2017
The  crossflow in cylinder marked by the phenomenon of stagnation point, shear layer separation and wake formation. Characteristics of flow regimes can be unsteady laminar flow (the formation of vortex shedding regime), transitional (regime with the ...
Arif Kurniawan
doaj  

The turbulent boundary layer with variable Prandtl number

, 1955
The general theory for the solution of the energy equation for laminar boundary layers with variable Prandtl number is applied directly to the turbulent case in order to extend the von Karman analogy between heat transfer and fluid friction to include a turbulence Prandtl number other than unity and a realistic shear distribution other than constant ...
openaire   +2 more sources

Near-wall determination of the turbulent prandtl number based on experiments, numerical simulation and analytical models [PDF]

, 2017
Papers presented at the 13th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Portoroz, Slovenia on 17-19 July 2017 .The Reynolds-averaged computation of turbulent flow with heat transfer most commonly introduces the ...
Brenn, G., Steiner, H., Irrenfried, C.
core  

A New Model for Prediction of Heat Eddy Diffusivity in Pipe Expansion Turbulent Flows [PDF]

Iranian Journal of Chemical Engineering, 2005
A new model to calculate heat eddy diffusivity in separating and reattaching flows based on modification of constant Prt is proposed. This modification is made using an empirical correlation between maximum Nusselt number and entrance Reynolds number ...
doaj  

A Study on Time-Scales Ratio and Turbulent Prandtl Number in Ducts of Industrial Applications

, 2006
This investigation concerns numerical time-scales ratio and turbulent Prandtl number in fully developed turbulent flows in ducts of various cross-sections.
Rokni, Masoud
core  

Study of the turbulent Prandtl number influence on the mixed convection heat transfer

, 2013
The present study is a first insight into the world of Computational Fluid Dynamics (CFD)in power engineering. That is, numerical methods and algorithms are used to solve and analyze problems that involve heat and fluid flows.
Romeu Coscolla, Adrià
core   +1 more source

Dynamic confinement controls the porous-to-free convection transition. [PDF]

Proc Natl Acad Sci U S A
Schwendener DM, Noir J, Latt J, Coreixas C, Kong XZ.   +4 more
europepmc   +1 more source