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Fluids
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Steam-Water Two-Phase Flows
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Steam-Water Two-Phase Flows

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Flow of Multi-Phase Fluids and Granular Materials".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 3014

Special Issue Editors

Dr. Afrasyab Khan

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Guest Editor
Research Institute of Mechanical Engineering, South Ural State University, 454080 Chelyabinsk, Russia
Interests: steam; water; FSI; supersonic flows; Reynolds number
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Atta Ullah

E-Mail Website
Co-Guest Editor
Department of Chemical Engineering, Pakistan Institute of Engineering & Applied Sciences (PIEAS), Islamabad P.O. Box 46000, Pakistan
Interests: heat and mass transfer; multiphase flows; Reynold number; high speed flows; industrial flows
Special Issues, Collections and Topics in MDPI journals
Dr. Khairuddin Sanaullah

E-Mail Website
Co-Guest Editor
Chemical Engineering Discipline, School of Engineering, University of KwaZulu-Natal, Durban, South Africa
Interests: heat and mass transfer; multiphase flows; Reynold number; high speed flows; industrial flows
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The experimental and theoretical modelling of heat and mass transfer rates in the processes of steam condensation are significant issues associated with the design of a wide range of industrial operations. This Special Issue of the Fluids journal will include articles covering the following topics: steam flow and condensation; up/down steam injection into water with different configurations of steam jets, including subsonic, sonic, and superheated; shockwave–steam jet interactions; and other relevant topics. Additionally, to model the physical characteristics of steam jet interactions with water (or other liquids, e.g., saline), as well as the condensation rates, it can be useful to utilize the source values of physical dimensionless parameters such as the Reynolds number (Reo), the Plume Richardson number (Ripo), the entrainment coefficient (αo), the buoyant vertical scale (Bo), and others. In addition, the implication of physical modelling related to geophysics flows involving the injection of a heated fluid(s) into cooled fluids to characterize the radial spreading of steam plumes in condensed water will be covered.

Dr. Afrasyab Khan
Prof. Dr. Atta Ullah
Dr. Khairuddin Sanaullah
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Fluids is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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Published Papers (2 papers)

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Research

15 pages, 4852 KiB  
Article
Hydrodynamics of Supersonic Steam Jets Injected into Cross-Flowing Water
by Hassan Ali Ghazwani, Khairuddin Sanaullah and Afrasyab Khan
Fluids 2023, 8(9), 250; https://doi.org/10.3390/fluids8090250 - 12 Sep 2023
Viewed by 1325
Abstract
High-speed gas/vapour jets injected into a cross-moving sonic liquid signifies a vital phenomenon which bears useful applications in environmental and energy processes. In the present experimental study, a pulsating jet of supersonic steam was injected into cross-flowing water. Circulation zones of opposite vorticity [...] Read more.
High-speed gas/vapour jets injected into a cross-moving sonic liquid signifies a vital phenomenon which bears useful applications in environmental and energy processes. In the present experimental study, a pulsating jet of supersonic steam was injected into cross-flowing water. Circulation zones of opposite vorticity owing to the interaction between the steam jet and cross-water flow were found. However, a large circulation appeared in front of the nozzle exit. Also, most small circulation regions were observed at higher water-flow rates (>2 m3/s). Among the prime mixing variables (i.e., turbulence kinetic energy (TKE) and Reynolds shear stress (RSS)), the RSS estimations backed a small diffusive phenomenon within a region far from the nozzle exit. Further information extracted from the PIV images indicated the existence of Kelvin–Helmholtz (KH) instabilities. The counter-rotating vortex pairs (CVPs) appeared to be significant in the region close to the nozzle exit, and they exhibited leeward side folds. Moreover, the effects of the operating conditions on the pressure recovery and mixing efficiency as well as the penetration and the separation height were evaluated to determine the optimisation of the phenomenon. By applying extreme difference analysis, the mixing efficiency was found as the most influential parameter. Full article
(This article belongs to the Special Issue Steam-Water Two-Phase Flows)
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13 pages, 2051 KiB  
Article
Hydrodynamics of Swirling Steam–Water Two-Phase Flows under External Shear
by Hassan A. S. Ghazwani, Khairuddin Sanaullah and Afrasyab Khan
Fluids 2023, 8(7), 205; https://doi.org/10.3390/fluids8070205 - 13 Jul 2023
Viewed by 1245
Abstract
The hydrodynamics of steam–water two-phase flows under the effects of shearing, swirling, and large-scale discrete boundary conditions were investigated on an experimental basis. The steam was injected in a swirling configuration into concurrently flowing water. Both the steam and water were injected at [...] Read more.
The hydrodynamics of steam–water two-phase flows under the effects of shearing, swirling, and large-scale discrete boundary conditions were investigated on an experimental basis. The steam was injected in a swirling configuration into concurrently flowing water. Both the steam and water were injected at gauge pressures of 1.0 and 2.0 bars, whereas the swirling was caused by a propeller moving at rotational speeds of 60 and 300 rpm. The ensembled normalized amplitudes of the velocity fluctuations across a layer defined by spatial positions along the radial and axial directions inhibited the swirling steam–water two-phase flows. This ensembled nature and the normalized amplitudes of the velocity fluctuations were investigated under the action of the above-stated operating conditions, and it was found that the swirling steam–water two-phase body of the flow showed proportionally varying percentages of ensembled-normalized amplitudes of the velocity fluctuations. Full article
(This article belongs to the Special Issue Steam-Water Two-Phase Flows)
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