Results 61 to 70 of about 7,894 (259)

Numerical study on periodic pressure fluctuations driven by air–water interactions in a dropshaft-tunnel system

Engineering Applications of Computational Fluid Mechanics
Air–water interactions in deep tunnel systems can cause safety risks. However, the multiphase flow dynamics under continuous air entrainment from upstream and release from downstream, which are the typical case in engineering practice, remain ...
Zheng Zhaolin, David Z. Zhu, Tuqiao Zhang, Feilong Dong, Yiyi Ma   +4 more
doaj   +1 more source

A Numerical Investigation of the Effects of Piston Bowl Geometry and Spray Angle on Combustion, Performance and Emission of a Diesel Engine

Energy Science &Engineering, EarlyView.
A piston bowl's design and spray angle improve air‐fuel mixing, resulting in more complete combustion and higher efficiency. Ansys Forte 2023 R1 a CFD software was used to analyze the effects of five combustion chamber geometries of cylinder, modified re‐entrant, re‐entrant, double‐stepped, and stepped on engine performance, combustion, and emission ...
Md. Nazmul Haque, Abdullah Al Rifat, Tafsirul Hassan, Md. Ifthaker Alam, Mohammad Mehedi Hasan Kazol, Md. Ashraful Islam, Abidur Rahman Adib, Mizanur Rahman   +7 more
wiley   +1 more source

Analytical and Numerical Study on the Performance of ‎Supersonic Ejector at Different Operating Conditions ‎and Working Fluids

Journal of Applied Fluid Mechanics, 2021
The computation of ejector geometry for a given fluid is essential and plays a crucial role in creating an ejector profile and performance analysis.
S. K. Yadav, K. M. Pandey, R. Gupta
doaj  

CFD informed design of bench-scale experiments to characterize air entrainment into fuel beds induced by columnar vortices. [PDF]

Fire Saf J, 2023
Di Cristina G, Bryant RA.
europepmc   +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

Effects of Air Entrainment on Bacterial Viability in Cement Paste. [PDF]

Materials (Basel), 2022
Kim H, Son HM.
europepmc   +1 more source

Experimental and Numerical Investigation of Cedar Façade Flame Spread With Respect to Sidewall

Fire and Materials, EarlyView.
ABSTRACT In response to growing energy conservation and carbon neutrality efforts, façade systems incorporating wooden materials have attracted increasing attention, which in turn raises concerns about their combustibility. This study presents a combined experimental and numerical investigation of flame spread along cedar façades.
Xukun Sun, Hideki Yoshioka, Takafumi Noguchi, Yuhei Nishio, Manabu Kanematsu, Biao Zhou, Mingwei Xu   +6 more
wiley   +1 more source

Effect of AEA-SP Dosage Sequence on Air Entrainment in FA Concrete

Nordic Concrete Research, 2019
Laboratory measurements show that varying the dosage sequence of air-entraining agent and co-polymer in the mix (SP added before, after or together with AEA) greatly affects air entrainment in fresh and hardened fly ash concrete.
Shpak Andrei, Jacobsen Stefan
doaj   +1 more source

INVESTIGATION ON EFFECTS OF ENLARGED PIPE RUPTURE SIZE AND AIR PENETRATION TIMING IN REAL-SCALE EXPERIMENT OF SIPHON BREAKER

Nuclear Engineering and Technology, 2014
To ensure the safety of research reactors, the water level must be maintained above the required height. When a pipe ruptures, the siphon phenomenon causes continuous loss of coolant until the hydraulic head is removed.
SOON HO KANG, KWON-YEONG LEE, GI CHEOL LEE, SEONG HOON KIM, DAE YOUNG CHI, KYOUNGWOO SEO, JUHYEON YOON, MOO HWAN KIM, HYUN SUN PARK   +8 more
doaj   +1 more source