NDLI: Two-phase bubbly flows in microgravity: Some open questions

Content Provider	Springer Nature Link
Author	Colin, Catherine
Copyright Year	2001
Abstract	Several studies on gas-liquid pipe flows in micro gravity have been performed. They were motivated by the technical problems arising in the design of the thermohydraulic loops for the space applications. Most of the studies were focused on the determination of the flow pattern, wall shear stress, heat transfer and phase fraction and provided many empirical correlations. Unfortunately some basic mechanism are not yet well understood in micro gravity.For example the transition from bubbly to slug flow is well predicted by a critical value of the void fraction depending on an Ohnesorge number, but the criteria of transition cannot take into account the pipe length and the bubble size at the pipe inlet. To improve this criteria, a physical model of bubble coalescence in turbulent flow is used to predict the bubble size evolution along the pipe in micro gravity, but it is still limited to bubble smaller than the pipe diameter and should be extended to larger bubbles to predict the transition to slug flow.Another example concerns the radial distribution of the bubbles in pipe flow, which control the wall heat and momentum transfers. This distribution is very sensitive to gravity. On earth it is mainly controlled by the action of the lift force due to the bubble drift velocity. In micro gravity in absence of bubble drift, the bubbles are dispersed by the turbulence of the liquid and the classical model fails in the prediction of the bubble distribution. The first results of experiments and numerical simulations on isolated bubbles in normal and micro gravity conditions are presented. They should allow in the future improving the modelling of the turbulent bubbly flow in micro gravity but also on earth.
Starting Page	16
Ending Page	21
Page Count	6
File Format	PDF
ISSN	09380108
Journal	Microgravity Science and Technology
Volume Number	13
Issue Number	2
e-ISSN	18750494
Language	English
Publisher	Springer Netherlands
Publisher Date	2001-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aerospace Technology and Astronautics Extraterrestrial Physics, Space Sciences Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Physics and Astronomy Engineering Modeling and Simulation

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Microgravity Bubbly-to-Slug Flow Regime Transition Theory and Modeling

Phase Distribution Characteristics of Bubbly Flow in Mini Pipes Under Normal and Microgravity Conditions

Experimental Investigation of a Bubbly Two-Phase Flow in an Open Capillary Channel under Microgravity Conditions

Bubbly Jet Impingement in Different Liquids

Hydrodynamic Modeling of Dense Gas-Particle Turbulence Flows Under Microgravity Space Environments

Granular Flow Under Microgravity: A Preliminary Review

Astrophysical Microgravity Experiments with Dust Particles

Study of Gas Core Behavior of Passive Cyclonic Two-Phase Separator for Microgravity Applications

Liquid-Gas-Like Phase Transition in Sand Flow Under Microgravity

Two-phase bubbly flows in microgravity: Some open questions

Similar Documents

Microgravity Bubbly-to-Slug Flow Regime Transition Theory and Modeling

Phase Distribution Characteristics of Bubbly Flow in Mini Pipes Under Normal and Microgravity Conditions

Experimental Investigation of a Bubbly Two-Phase Flow in an Open Capillary Channel under Microgravity Conditions

Bubbly Jet Impingement in Different Liquids

Hydrodynamic Modeling of Dense Gas-Particle Turbulence Flows Under Microgravity Space Environments

Granular Flow Under Microgravity: A Preliminary Review

Astrophysical Microgravity Experiments with Dust Particles

Study of Gas Core Behavior of Passive Cyclonic Two-Phase Separator for Microgravity Applications

Liquid-Gas-Like Phase Transition in Sand Flow Under Microgravity

Two-phase bubbly flows in microgravity: Some open questions