Results 51 to 60 of about 14,104 (341)

Numerical Analysis of Proton Exchange Membrane Fuel Cell Performance With a Lung Serpentine Flow Field

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Proton exchange membrane fuel cells (PEMFC) are regarded as the best clean energy conversion technology because of their smaller number of emissions and higher efficiency. This numerical investigation used two different flow channel designs—the serpentine flow field (SFF) and the lung serpentine flow field (LSFF)—with active areas of 5 by 5 cm.
Muralikrishna Boni   +3 more
wiley   +1 more source

Turbulence closure: turbulence, waves and the wave-turbulence transition – Part 1: Vanishing mean shear [PDF]

open access: yesOcean Science, 2009
This paper extends a turbulence closure-like model for stably stratified flows into a new dynamic domain in which turbulence is generated by internal gravity waves rather than mean shear.
H. Z. Baumert, H. Peters
doaj  

CFD Investigation of Industrial Gas-liquid Preneutralizer Based on a Bioreactor Benchmark for Spargers Optimization

open access: yesChemical Engineering Transactions, 2022
In this paper, a benchmark study between chemical and biochemical reactors is carried out using Computational Fluid Dynamics (CFD) approach.
Safae Elmisaoui   +4 more
doaj   +1 more source

Research on Optimization of Flow Field and Combustion Performance in Boilers With Combined Near‐Wall Air Supply Systems

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In the pulverized coal boiler industry, reducing NOx emissions has become a critical objective. Although low‐NOx combustion technologies are effective, they may lead to localized high‐temperature corrosion. To address this issue, near‐wall air supply technology has been introduced, which involves injecting an appropriate amount of air near the
Wangyongjia Zhong   +4 more
wiley   +1 more source

Evaluating k-epsilon with One-Equation Turbulence Model

open access: yes, 2013
Peer ...
Rahman, M.M.   +3 more
openaire   +3 more sources

Study on the Accuracy of RANS Modelling of the Turbulent Flow Developed in a Kaplan Turbine Operated at BEP. Part 1 - Velocity Field

open access: yesJournal of Applied Fluid Mechanics, 2019
This paper investigates the accuracy of Reynolds-averaged Navier-Stokes (RANS) turbulence modelling applied to complex industrial applications. In the context of the increasing instability of the energy market, hydropower plants are frequently working at
R. G. Iovănel   +2 more
doaj  

Dynamic flow analysis using an OpenFOAM based CFD tool: Validation of Turbulence Intensity in a testing site

open access: yesITM Web of Conferences, 2014
The presenting paper investigates on the validation of the turbulence intensity (TI) modeled by a CFD tool. Six meteorological masts, equipped with cup anemometers, have been used for the purpose. Three different turbulence closure schemes, which are the
Casella Livio   +4 more
doaj   +1 more source

Migration and Dispersion Evolution of Exhaled Aerosol in a Ward Under Different Ventilation Modes

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Wards with special functions and closure will have a higher risk of viral transmission as aerosols are an important mode of transmission for the SARS‐CoV‐2 virus. In this study, an experimental platform was built to establish the relevant parameters of the aerosol model and the aerosol propagation model according to the experimental results ...
Jingzhi Zhang   +8 more
wiley   +1 more source

Numerical Modelling of Non-isotropic Stratified Flows Using an Explicit Algebraic Reynolds Stress Turbulence Model (EARSM)

open access: yesنشریه مهندسی دریا, 2015
Flows of natural hydro-environments are usually turbulent and mostly stratified, like the flows in lakes, reservoirs, estuaries and atmosphere to name a few. In stratified flows due to the buoyancy forces, the turbulent stresses are usually non-isotropic.
mohammadreza amiri, Kourosh hejazi
doaj  

Investigation of entrance length in circular and noncircular conduits by computational fluid dynamics simulation [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2014
This study estimated entrance length of circular and noncircular conduits, including circle, triangle, square and hexagon cross-sectional conduit, by using computational fluid dynamics (CFD).
Pimpun Tongpun   +2 more
doaj  

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