Results 51 to 60 of about 5,304 (193)

Flow Characteristics and Response Surface Methodology‐Based Pressure‐Loss Prediction Models for the Reverse Circulation Converter in Double‐Wall Drill Pipes

Energy Science &Engineering, EarlyView.
Flow characteristics and pressure loss mechanisms of a reverse circulation converter in dual‐wall drill pipes are systematically investigated using CFD and response surface methodology. The results reveal the dominant role of inertial dissipation and provide a predictive framework for optimizing converter design and operational parameters. ABSTRACT The
Mingming Geng, Hui Zhang, Junpeng Li, Baokang Wu, Geng Zhang, Xinrui Wang, Jintao An, Long Chen, Yiming Ma   +8 more
wiley   +1 more source

Hydrogen‐Enriched Tri‐Fuel Combustion for Low‐Carbon Engines at Medium Engine Load: A Comprehensive CFD Analysis

Energy Science &Engineering, EarlyView.
CFD analysis of a diesel–CH4–H2 tri‐fuel engine shows that increasing hydrogen energy share (HES) enhances mixing and accelerates combustion, improving pressure, efficiency, and reducing CO and soot. At 60% HES, ISFC improves 26.2%, soot drops 95%, while NOx increases due to higher temperatures. ABSTRACT The global commitment to achieve net‐zero carbon
Md. Ifthaker Alam, Tafsirul Hassan, Md Imtiaz Hossen, Md. Shaib Hossain, Bandhon Saha Bijoy   +4 more
wiley   +1 more source

Forced Draught Impact on Externally Venting Flames: An Experimental and Numerical Investigation

Fire and Materials, EarlyView.
ABSTRACT Wind can significantly influence fire development and spread in urban and forest environments causing fatal consequences for the public, the first responders, and the environment. Wind‐driven fires can have a significant impact on structural fires as wind can increase the fire's intensity, development, and flame spread.
Anoop Subramania Warrier, Jan Smolka, Kamila Kempna, Meet Panchal, Tony Graham, Eleni Asimakopoulou   +5 more
wiley   +1 more source

Discussion of Polyethylene Glycol Mixtures and PEG + MWCNT Nanocolloids’ Behavior in Thermal Applications

Applied Sciences
Nanocolloids are nanoparticles suspended in fluids with the aim of improving fluid capability at heat transfer, with a focus on thermal conductivity. The major advantage is the increase in thermal conductivity, with a certain influence on isobaric heat ...
Alina Adriana Minea, Elena Ionela Chereches, Catalin Andrei Tugui, George Catalin Tofan   +3 more
doaj   +1 more source

Modeling mixing convection analysis of discrete partially filled porous channel for optimum design

Alexandria Engineering Journal, 2015
Mixing convection flow inside a convergent horizontal channel partially filled with porous material and a clear channel are investigated numerically in the present study.
Mohamed G. Ghorab
doaj   +1 more source

A Detailed Review of Colburn and Friction Factors for Various Types of Fins Used in Compact Plate‐Fin Heat Exchangers

Heat Transfer, EarlyView.
ABSTRACT Compact plate‐fin heat exchangers (PFHEs) are commonly utilized in diverse industries, including aerospace, automotive, processing, and space. Various fin configurations, such as Plain fins, Wavy fins, Lance and Offset fins (OSFs), Perforated fins, louvered fins, and pin fins, are employed in compact heat exchangers (CHEs).
Chennu Ranganayakulu
wiley   +1 more source

Stellar convection as a low Prandtl number flow [PDF]

International Astronomical Union Colloquium, 1991
AbstractThermal convection in the Sun and cool stars is often modeled with the assumption of an effective Prandtl number σ ≃ 1. Such a parameterization results in masking of the presence of internal shear layers which, for small σ, might control the large scale dynamics.
openaire   +1 more source

Zero Prandtl-number rotating magnetoconvection [PDF]

Physics of Fluids, 2017
We investigate instabilities and chaos near the onset of Rayleigh-Bénard convection of electrically conducting fluids with free-slip, perfectly electrically and thermally conducting boundary conditions in the presence of uniform rotation about the vertical axis and horizontal external magnetic field by considering zero Prandtl-number limit (Pr → 0 ...
Ghosh, Manojit, Pal, Pinaki
openaire   +2 more sources

New Thermal Lattice Boltzmann Method for Modeling Heat Transfer Problems Considering Temperature‐Dependent Properties

Heat Transfer, EarlyView.
ABSTRACT Several engineering problems involve the need to model conjugate heat transfer processes considering the temperature‐dependence of the material properties. Consequently, a simulation tool capable of modeling this process is of great interest. In this context, the present work proposes a thermal lattice Boltzmann method (TLBM) for modeling the ...
Julia Akiko Sassa, Ivan Talão Martins, Luben Cabezas Gómez   +2 more
wiley   +1 more source

Natural convection in a square Cavity: Effects of Rayleigh and Prandtl numbers on heat transfer and flow patterns

Case Studies in Thermal Engineering
Natural convection within enclosures plays a crucial role in heat transfer across various thermal systems. This study presents a validated numerical benchmark for buoyancy-driven flow in a square cavity with differential heating, focusing solely on the ...
Saleh A. Bawazeer, Mohammad S. Alsoufi
doaj   +1 more source