Direct numerical simulation of backward-facing step flow at Ret = 395 and expansion ratio 2 [PDF]
Journal of Fluid Mechanics, 2019 Backward-facing step (BFS) constitutes a canonical configuration to study wallbounded flows subject to massive expansions produced by abrupt changes in geometry.
Gorobets, Andrei +3 more
core +3 more sources
High-Strength Bio-Degradable Polymer Foams with Stable High Volume-Expansion Ratio Using Chain Extension and Green Supercritical Mixed-Gas Foaming. [PDF]
Polymers (Basel), 2023 The preparation of biodegradable polymer foams with a stable high volume-expansion ratio (VER) is challenging. For example, poly (butylene adipate-co-terephthalate) (PBAT) foams have a low melt strength and high shrinkage. In this study, polylactic acid (
Long H +9 more
europepmc +2 more sources
Integrated Machine Vision System for Evaluating Hole Expansion Ratio of Advanced High-Strength Steels. [PDF]
Materials (Basel), 2022 In this paper, we propose a new method to estimate the hole expansion ratio (HER) using an integrated analysis system. To precisely measure the HER, three kinds of analysis methods (computer vision, punch load, and acoustic emission) were utilized to ...
Park J, Won C, Lee HJ, Yoon J.
europepmc +2 more sources
N-Phase Local Expansion Ratio for Characterizing Out-of-Phase Lung Ventilation. [PDF]
IEEE Trans Med Imaging, 2020 Out-of-phase ventilation occurs when local regions of the lung reach their maximum or minimum volumes at breathing phases other than the global end inhalation or exhalation phases.
Shao W +7 more
europepmc +2 more sources
Polysulfone foam with high expansion ratio prepared by supercritical carbon dioxide assisted molding foaming method. [PDF]
RSC Adv, 2018 Polysulfone (PSU) is considered as an important candidate for the fabrication of high-performance microcellular polymers, but the preparation of PSU foam with a high expansion ratio still remains a big challenge worldwide.
Li Z, Jia Y, Bai S.
europepmc +2 more sources
Study on Separation Characteristics of Nozzles with Large Expansion Ratio of Solid Rocket Motors
Aerospace, 2022 In order to study the flow characteristics of a nozzle with large expansion ratio and its influence on the force on the nozzle, ground cold flow test research and a fluid–structure coupling simulation analysis were carried out (maximum expansion ratio ε =
Zhihong Wang +2 more
semanticscholar +1 more source
Experimental investigation on the influencing factors of preparing three-phase foam [PDF]
Journal of the Serbian Chemical Society, 2023 A three-phase foam is considered one of the promising advanced materials for fighting fires. However, the preparation conditions, cost and effect are key factors for industrial applications.
Wang Bin +3 more
doaj +1 more source
Relationship between Rice Flour Particle Sizes and Expansion Ratio of Pure Rice Bread. [PDF]
J Appl Glycosci (1999), 2016 We examined a method to produce bread from crystalline rice flour without using thickening agents such as gluten, polysaccharide thickening, and amorphous rice flour. Rice grains were pulverized by a jet mill to produce flour.
Murakami S +4 more
europepmc +2 more sources
Maximizing the Expansion Ratio through Multi-stage Shear-cutting Process during Collar Forming [PDF]
IOP Conference Series: Materials Science and Engineering, 2018 Previous investigations showed that a two-stage punching process reduced the edge crack sensitivity on high-strength multi-phase steels significantly compared to a single-stage process.
Martin Feistle +5 more
openalex +2 more sources
Study and Application of Foamed Cement Solidified Filling Materials
Meikuang Anquan, 2020 In view of the coal spontaneous combustion accident caused by air leakage in the mine, this paper studied the foaming cement solidified filling material used for mine filling and plugging with cement as the base material, foaming agent, gypsum and ...
JIN Yongfei, LI Chuansheng, CHENG Ming
doaj +1 more source