Results 51 to 60 of about 3,296 (231)

Variable Turbulent Prandtl Number Model for Shock/Boundary-Layer Interaction

, 2018
Interaction of shock waves with turbulent boundary layers can enhance the surface heat flux dramatically. Reynolds-averaged Navier-Stokes simulations based on a constant turbulent Prandtl number often give grossly erroneous heat transfer predictions in ...
SINHA, K, ROY, S, PATHAK, U
core   +1 more source

Boundary layers in turbulent vertical convection at high Prandtl number [PDF]

, 2022
Many environmental flows arise due to natural convection at a vertical surface, from flows in buildings to dissolving ice faces at marine-terminating glaciers.
Howland, Christopher J.; id_orcid, Howland, Christopher J., Ng, Chong Shen, Verzicco, Roberto; id_orcid, Verzicco, Roberto, Lohse, Detlef   +5 more
core   +1 more source

Passive scalar diffusion in three-dimensional turbulent rectangular free jets with numerical evaluation of turbulent Prandtl/Schmidt number [PDF]

, 2018
The passive scalar spreading of fluids with laminar Prandtl or Schmidt number, Pr,Sc, equal to 1 in turbulent rectangular submerged free jets is analyzed by means of numerical simulation and theoretical analysis in the Reynolds number range 5000-40,000 ...
Fabio Gori (718850), Andrea Boghi (4907776), Ivan Di Venuta (7122314), Matteo Angelino (1259724)   +3 more
core   +2 more sources

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

A study of chevron type plate design on pressure drop and friction factor of brazed plate heat exchanger

Environmental Progress &Sustainable Energy, EarlyView.
Abstract Brazed plate heat exchanger (BPHE) was analyzed using computational fluid dynamics (CFD) simulations by ANSYS Fluent to investigate the chevron‐patterned plates. The influence of geometric parameters, including corrugation pitch, depth, and angle was analyzed.
J. S. Huang, K. B. Then, X. W. Wang
wiley   +1 more source

Prandtl-, Rayleigh-, and Rossby-number dependence of heat transport in turbulent rotating Rayleigh-Bénard convection [PDF]

, 2009
Experimental and numerical data for the heat transfer as a function of the Rayleigh-, Prandtl-, and Rossby numbers in turbulent rotating Rayleigh-Bénard convection are presented.
Stevens, Richard Johannes Antonius Maria, Ahlers, G., Zhong, JQ, Verzicco, Roberto; id_orcid, Jin-Qiang Zhong, Zhong, Jin Qiang, Lohse, D., Stevens, Richard J.A.M.; id_orcid, Eckhardt, Bruno, Lohse, D, Roberto Verzicco, Verzicco, R., Verzicco, Roberto ; id_orcid, Stevens, Richard Johannes Antonius Maria; id_orcid, Ahlers, Guenter, Stevens, RJAM Richard, Clercx, Herman J.H.; id_orcid, Richard J. A. M. Stevens, Clercx, HJH, Ahlers, G, Ahlers, Günter, Clercx, Herman J.H., Clercx, HJH Herman, Stevens, Richard J.A.M., Stevens, R.J.A.M., Stevens, RJAM, Zhong, Jin-Qiang, Eckhardt, prof.dr., B., Zhong, J-Q, Detlef Lohse, Clercx, H.J.H., Zhong, J.-Q., Lohse, Detlef, Verzicco, Roberto, Herman J. H. Clercx, Verzicco, R, Guenter Ahlers, Clercx, H.J.H.; id_orcid   +37 more
core   +1 more source

Mixing Behavior of Natural Gas and Hydrogen in a High‐Efficiency Vane (HEV) Static Mixer

Energy Science &Engineering, EarlyView.
Static mixers play a crucial role in the safe transport of hydrogen‐blended natural gas. Computational fluid dynamics (CFD) was employed to investigate the effects of structural parameters of the HEV static mixer on the mixing behavior and homogeneity of natural gas and hydrogen. The modeling approach was well validated against experimental data.
Xiang Zhou, Jun Zheng, Weiqing Xu, Dewen Kong, Yan Shi, Maolin Cai   +5 more
wiley   +1 more source

Jet in Accelerating Turbulent Crossflow with Passive Scalar Transport

Energies, 2022
The interaction of a turbulent, spatially developing crossflow with a transverse jet possesses several engineering and technological applications such as film cooling of turbine blades, exhaust plumes, thrust vector control, fuel injection, etc.
Carlos Quiñones, Guillermo Araya
doaj   +1 more source

Effect of Tunnel Ventilation on Hydrogen Dispersion From Leaks in Hydrogen Fuel Cell Trucks

Energy Science &Engineering, EarlyView.
This study investigates hydrogen leakage scenarios involving hydrogen fuel cell trucks within tunnels. Using computational fluid dynamics methods, it explores the distribution characteristics of hydrogen concentrations and the efficiency of ventilation under different forced ventilation conditions. ABSTRACT The widespread adoption of hydrogen fuel cell
Limin Geng, Shiyu Shan, Zongxue Yan, Nan Gao, Dong Huang, Zhao Gao, Xinxin Cao   +6 more
wiley   +1 more source

Eddy diffusivity based comparisons of turbulent prandtl number for boundary layer and free jet flows with reference to fluids of very low prandtl number

, 1993
It is shown that turbulent Prandtl numbers for turbulent boundary layer and jet flows correlate well if compared on the basis of eddy diffusivity. Experimental data for liquid sodium (Pr= 0.0058) lead to a universal expression relating turbulent Prandtl ...
Bremhorst, K., Krebs, L.
core   +1 more source