Results 61 to 70 of about 56,552 (191)

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

NUMERICAL SIMULATION OF THE LAMINAR-TURBULENT TRANSITION IN A HIGH-LOADED TRANSONIC TURBINE CASCADE

Авіаційно-космічна техніка та технологія, 2017
A three-dimensional turbulent flow of a viscous compressible gas through a high-loaded transonic turbine cascade is considered, taking into account the laminar-turbulent transition.
С. В. Ершов, В. А. Яковлев, М. Н. Гризун   +2 more
doaj   +1 more source

A construction and training data correction method for deep learning turbulence model of Reynolds averaged Navier–Stokes equations

AIP Advances, 2022
This paper aims at proposing a data-driven Reynolds Averaged Navier–Stokes (RANS) calculation model based on physically constrained deep learning. Using the standard k − ɛ model as the template, part of the source terms in the ɛ equation is replaced by ...
Shuming Zhang, Haiwang Li, Ruquan You, Tinglin Kong, Zhi Tao   +4 more
doaj   +1 more source

Weak-inertial flow between two rough surfaces [PDF]

, 2005
“Oseen–Poiseuille” equations are developed from an asymptotic formulation of the three-dimensional Navier–Stokes equations in order to study the influence of weak inertia on flows between rough surfaces.
Bergeon, Alain, Lo Jacono, David, Plouraboué, Franck   +2 more
core   +3 more sources

Local Polynomial Regression and Filtering for a Versatile Mesh‐Free PDE Solver

International Journal for Numerical Methods in Fluids, EarlyView.
A high‐order, mesh‐free finite difference method for solving differential equations is presented. Both derivative approximation and scheme stabilisation is carried out by parametric or non‐parametric local polynomial regression, making the resulting numerical method accurate, simple and versatile. Numerous numerical benchmark tests are investigated for
Alberto M. Gambaruto
wiley   +1 more source

Direct Numerical Simulations of the Navier-Stokes Alpha Model

, 1999
We explore the utility of the recently proposed alpha equations in providing a subgrid model for fluid turbulence. Our principal results are comparisons of direct numerical simulations of fluid turbulence using several values of the parameter alpha ...
Andrews, Ashurst, Borue, Camassa, Cao, Chen, Chen, Chorin, Cioranescu, Cioranescu, Dunn, Dunn, Dunn, Holm, Holm, Kolmogorov, Kolmogorov, Lesieur, Rivlin, Rubinstein, Shin, Wang, Yoshizawa   +22 more
core   +2 more sources

Parameterization of travelling waves in plane Poiseuille flow [PDF]

, 2012
© The authors 2012. Published by Oxford University Press on behalf of the Institute of Mathematics and its Applications. All rights reserved. This is a pre-copyedited, author-produced PDF of an article accepted for publication in [IMA Journal of Applied ...
Smith, WR, Wissink, JG
core   +1 more source

Numerical Insights Into the Resistance Reduction Mechanisms of Forward Tapered Transoms in High‐Speed Catamaran: A Computational Fluid Dynamics‐Based Study

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study investigates the hydrodynamic influence of forward transom tapering on a displacement catamaran hull using computational fluid dynamics (CFD) simulations. Five taper configurations ranging from a vertical transom base design to a fully tapered stern (1.00B) were evaluated over a wide Froude number range (Fr = .3 to 1.0).
Chalermkiat Nuchturee, Chairat Napasaksri, Ramil Kesvarakul, Sarawuth Srinakaew   +3 more
wiley   +1 more source

A diagonally inverted LU implicit multigrid scheme for the 3-D Navier-Stokes equations and a two equation model of turbulence [PDF]

An LU implicit multigrid algorithm is developed to calculate 3-D compressible viscous flows. This scheme solves the full 3-D Reynolds-Averaged Navier-Stokes equation with a two-equation kappa-epsilon model of turbulence. The flow equations are integrated
Yokota, Jeffrey W.
core   +1 more source

Turbulent snow transport and accumulation: New reduced‐order models and diagnostics

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Our new reduced‐order models of snow particle transport provide high‐fidelity calculations of snow accumulation in turbulent flows at significantly reduced computational costs. Additional accumulation diagnostics from the reduced‐order model predict complex patterns of particle concentration in turbulent boundary layers via coherent flow structures in ...
Nikolas O. Aksamit, Alex P. Encinas‐Bartos, Holt Hancock, Alexander Prokop   +3 more
wiley   +1 more source