Physical and Chemical Phenomena in High-Speed Flows

A special issue of Fluids (ISSN 2311-5521). This special issue belongs to the section "Turbulence".

Deadline for manuscript submissions: 31 May 2026 | Viewed by 1445

Special Issue Editor


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Department of Mechanical Engineering, School of Engineering, Faculty of Engineering, Computing and The Environment, Kingston University London, Roehampton Vale Campus, Friars Avenue, London SW15 3DW, UK
Interests: aerospace engineering; aerodynamics; computational fluid dynamics; high-speed flow; multiphase flow
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Special Issue Information

Dear Colleagues,

When a vehicle travels through the atmosphere at a high speed, the surrounding gas experiences complicated physical and chemical processes thus producing high-temperature gas effects. High-temperature gas effects are a key issue related to high-speed aerodynamic design and optimization. The development and implementation of methods and tools that adequately model fundamental physics and allow for credible physics-based optimization for future operational high-speed vehicle systems are becoming more important due to the requirements of ensuring their flight safety. The aero-thermodynamic design and optimization of high-speed vehicles include wind tunnel testing, flight experiments, and computer simulations. Many aerodynamic and propulsion characteristics still remain uncertain and are difficult to predict due to the lack of flight test data and limitations of ground test facilities.

The Special Issue focuses on the recent advances in the theoretical, numerical, and experimental modeling and simulation of high-speed flows with physical and chemical phenomena. It aims to publish basic and applied research papers, as well as review papers, addressing the high-temperature effects and processes in high-speed flows. Emphasis is placed on how high-temperature processes affect the aerodynamics of high-speed vehicles.

Topics of interest include, but are not limited to, the following areas: high-temperature effects, shock and blast waves; mathematical modeling and numerical analysis of shock waves propagation; experimental and theoretical studies on the interaction of shock waves with bodies and obstacles; and fluid dynamics of high-speed reacting flows.

Researchers are invited to contribute their latest insights to the Special Issue and help to advance the field of fluid dynamics of high-speed flows.

Dr. Konstantin Volkov
Guest Editor

Manuscript Submission Information

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Keywords

  • high-speed flow
  • shock wave
  • computational flow dynamics
  • chemical reactions
  • turbulence
  • high-temperature effects

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Published Papers (2 papers)

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Research

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19 pages, 1717 KB  
Article
Shock Wave Propagation and Its Diffraction in an Annular Channel
by Konstantin Volkov
Fluids 2025, 10(11), 295; https://doi.org/10.3390/fluids10110295 - 13 Nov 2025
Viewed by 252
Abstract
A computational study is conducted on shock wave propagation and diffraction in an annular duct. The curved geometry and central obstruction of the annular configuration generate complex wave phenomena not typically observed in linear channels. The evolution of incident shock fronts, their interactions [...] Read more.
A computational study is conducted on shock wave propagation and diffraction in an annular duct. The curved geometry and central obstruction of the annular configuration generate complex wave phenomena not typically observed in linear channels. The evolution of incident shock fronts, their interactions with the inner and outer walls, and the resulting diffraction patterns are analysed in detail. Particular focus is placed on the formation of reflected and transmitted waves, as well as the effects of curvature and channel dimensions on shock strength and propagation speed. High-resolution computational fluid dynamics (CFD) simulations are used to capture transient flow features, and results are validated against available experimental data. Simulations are performed across a range of annular geometries with varying radii of curvature and inlet Mach numbers. Simulations across a range of inlet Mach numbers (1.5–3.0) and radii of curvature show that increasing curvature intensifies shock focusing near the inner wall, raising local pressure peaks by up to 20%, while promoting faster attenuation of the transmitted wave downstream. At higher Mach numbers, the reflected shock transitions from regular to Mach reflection, producing triple-point structures. The comparison of shock structures across configurations shows good agreement with experimental observations. The findings enhance understanding of shock dynamics in non-standard geometries and have implications for the design of detonation engines, pulse detonation systems, and safety analyses in confined environments. Full article
(This article belongs to the Special Issue Physical and Chemical Phenomena in High-Speed Flows)
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Other

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31 pages, 19437 KB  
Interesting Images
Fringes, Flows, and Fractures—A Schlieren Study of Fluid and Optical Discontinuities
by Emilia Georgiana Prisăcariu, Raluca Andreea Roșu and Valeriu Drăgan
Fluids 2025, 10(9), 243; https://doi.org/10.3390/fluids10090243 - 16 Sep 2025
Viewed by 812
Abstract
This article presents a collection of schlieren visualizations captured using a custom-built, laboratory-based imaging system, designed to explore a wide range of flow and refractive phenomena. The experiments were conducted as a series of observational case studies, serving as educational bloc notes for [...] Read more.
This article presents a collection of schlieren visualizations captured using a custom-built, laboratory-based imaging system, designed to explore a wide range of flow and refractive phenomena. The experiments were conducted as a series of observational case studies, serving as educational bloc notes for students and researchers working in fluid mechanics, optics, and high-speed imaging. High-resolution images illustrate various phenomena including shockwave propagation from bursting balloons, vapor plume formation from volatile liquids, optical surface imperfections in transparent materials, and the dynamic collapse of soap bubbles. Each image is accompanied by brief experimental context and interpretation, highlighting the physical principles revealed through the schlieren technique. The resulting collection emphasizes the accessibility of flow visualization in a teaching laboratory, and its value in making invisible physical processes intuitively understandable. Full article
(This article belongs to the Special Issue Physical and Chemical Phenomena in High-Speed Flows)
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