Multiphase Science and Technology最新文献

Characterization of a capillary driven flow in microgravity by means of optical technique 微重力条件下毛细管驱动流动的光学表征

Multiphase Science and Technology Pub Date : 2023-12-06 DOI: 10.1615/multscientechn.2023047919

Domenico Fiorini, Louis Carbonnelle, A. Simonini, J. Steelant, D. Seveno, M. A. Mendez

{"title":"Characterization of a capillary driven flow in microgravity by means of optical technique","authors":"Domenico Fiorini, Louis Carbonnelle, A. Simonini, J. Steelant, D. Seveno, M. A. Mendez","doi":"10.1615/multscientechn.2023047919","DOIUrl":"https://doi.org/10.1615/multscientechn.2023047919","url":null,"abstract":"The motion of a gas-liquid interface along a solid wall is influenced by the capillary forces resulting from the interface's shape and its interaction with the solid, where it forms a dynamic contact angle. Capillary models play a significant role in the management of cryogenic propellants in space, where surface tension dominates the behaviour of gas-liquid interfaces. Yet, most empirical models have been derived in configurations dominated by viscous forces. In this study, we experimentally investigate the wetting of a low-viscosity, highly wetting fluid in a reduced gravity environment. Our setup consisted of a transparent and diverging U-tube in which capillary forces sustain the liquid motion. Combining Particle Image Velocimetry (PIV) and high-speed backlighting visualization, the experimental campaign allowed for measuring the interface evolution and the velocity field within the liquid under varying gravity levels. This work reports on the preliminary results from the image velocimetry and shows that the velocity profile within the tube is close to parabolic until a short distance from the interface. Nevertheless, classic 1D models for capillary rise face difficulties reproducing the interface dynamics, suggesting that the treatment of the surface tension in these problems must be reviewed.","PeriodicalId":34942,"journal":{"name":"Multiphase Science and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67730668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

FLOW VISUALIZATION AND FLOW PATTERNS IN A FLAT-PLATE POLYPROPYLENE PULSATING HEAT PIPE 聚丙烯平板脉动热管中的流动可视化和流型

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047892

A. A. Alqahtani, V. Bertola

引用次数: 0

CFD simulation of cuttings transport in eccentric horizontal and inclined annulus 偏心水平和倾斜环空岩屑运移的CFD模拟

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023048506

vivek deshmukh, Satish Kumar Dewangan

引用次数: 0

DYNAMICAL THRESHOLD OF CAVITATION DUE TO WEAK TENSION INDUCED BY WATER FLOWS 由水流引起的弱张力引起的空化动力学阈值

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047547

T. Fujikawa, R. Egashira, K. Hooman, Masakazu Fukuda, S. Fujikawa

引用次数: 0

Phase transition retrieval through in situ observations 通过现场观测反演相变

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023046998

Mikhail Romanovski

引用次数: 0

Carbon dioxide-water bubbly flow in a vertical pipe with or without chemical absorption 有或无化学吸收的垂直管道中的二氧化碳-水气泡流

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047133

D. Sa’adiyah, Kanta Sato, Ryo Kurimoto, Kosuke Hayashi, A. Tomiyama

引用次数: 0

Wall Effects on the Thermocapillary Migration of Isolated Droplet in Liquids 孤立液滴在液体中热毛细迁移的壁效应

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047718

Y. Alhendal

引用次数: 0

Assessment of Multi-Fluid, Eulerian Integral Thin Film and DPM Approaches for the Numerical Simulation of a Bearing Chamber 多流体、欧拉积分薄膜和DPM方法在轴承室数值模拟中的应用

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047885

Nikolay Kirov, Davide Zuzio, Jean-Mathieu Senoner, Claire Laurent, Mathieu Picard, Jean-Luc Estivalezes

{"title":"Assessment of Multi-Fluid, Eulerian Integral Thin Film and DPM Approaches for the Numerical Simulation of a Bearing Chamber","authors":"Nikolay Kirov, Davide Zuzio, Jean-Mathieu Senoner, Claire Laurent, Mathieu Picard, Jean-Luc Estivalezes","doi":"10.1615/multscientechn.2023047885","DOIUrl":"https://doi.org/10.1615/multscientechn.2023047885","url":null,"abstract":"In this work several computational approaches are tested for the two-phase simulation of the ELUBSYS bearing chamber in the high-speed regime - a 4-equation Eulerian multi-fluid model, a steady-state Eulerian Integral Thin Film (EITF) approach, a Discrete Parcel Method (DPM) approach and a simplified EITF-DPM coupled approach. While computationally expensive, the multi-fluid model captured the global liquid dynamics in the chamber and predicted that most of the oil is in the form of a thin film that flows on the stationary walls. The much more cost-efficient EITF approach achieved accurate results for the oil thickness distribution at the counter-current region but did not account for the large amounts of oil flowing out through the top vent. The DPM approach was used to assess the dispersed phase dynamics in both one-way and two-way coupling configurations, outlining a significant influence of the latter on the gas phase dynamics. Finally, the coupled EITF-DPM approach was able to overcome some of the limitations observed by its individual counterparts by predicting a continuous film throughout the chamber circumference and a higher vent outflow, while still retaining most of the expected film distribution characteristics in the bearing chamber.","PeriodicalId":34942,"journal":{"name":"Multiphase Science and Technology","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136210083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fractal Analysis of Gas-non-Newtonian Liquid Two-Phase Flow in Microchannels 微通道中气体-非牛顿液体两相流的分形分析

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047880

Haslinda Kusumaningsih, D. Deendarlianto, I. Indarto, Muhammad Fakhri Alfath, M. Madani, Aldy Franstanata Ritonga

引用次数: 0

EFFECT OF CURVATURE DISTORTION AND REFRACTIVE INDEX ON FLOW MEASUREMENT IN A DROPLET 曲率畸变和折射率对液滴流量测量的影响

Multiphase Science and Technology Pub Date : 2023-01-01 DOI: 10.1615/multscientechn.2023047899

Eugene Gatete, Akiko KANEKO, Biao SHEN

引用次数: 0