Frontiers in Supercritical Fluids

A special issue of Fluids (ISSN 2311-5521).

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 2686

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, University of Nevada-Las Vegas, Las Vegas, NV 89154-4027, USA
Interests: computational fluid dynamics; two-phase flows; supercritical fluids; biofluids; compressible fluid flow

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Guest Editor
School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an, Shaanxi 710049, China
Interests: heat transfer enhancement; compact heat exchanger; thermoelectric generator; electronic cooling

Special Issue Information

Dear Colleagues,

Supercritical fluids have been widely used in various industrial engineering applications including power engineering, aerospace engineering, chemical engineering, microelectromechanical systems (MEMS), and refrigeration engineering. Supercritical pressure reactors (SCRs) and refrigeration and air-conditioning systems are gradually using carbon dioxide as a working fluid due to its attractive physical and transport properties. The character of supercritical fluid is so peculiar that differences between gas and liquid disappear regardless of its temperature when the pressure of the fluid is above the thermal critical value. That is to say, the phase change phenomenon no longer happens under supercritical conditions, which is very beneficial for simplifying equipment in the energy conversion system, for example, gas–liquid separators. Carbon dioxide and water are the most commonly used supercritical fluids, which have been used for many engineering applications. Our understanding of this system has advanced tremendously in the past few decades, and with exciting developments in numerical methods and experimental techniques, we would like to present the very latest progress in supercritical fluid research.

The aim of this Special Issue is to promote the recent advances in thermodynamics, experimental measurements, and numerical modeling that demonstrate and enable fundamental insights into supercritical fluid flow. In particular, we are seeking to highlight the state of the art of steady-state or transient-state systems, as well as new theoretical and experimental representations of engineering systems, methods for assimilating and combining experimental data with numerical simulations, and novel methods for extracting meaningful information from supercritical fluid flow data, whether in the form of visualizations, data/model reduction, or meaningful engineering indices.

Prof. Dr. Yi-Tung Chen
Prof. Dr. Ting Ma
Guest Editors

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Keywords

  • thermodynamics
  • Brayton power cycle
  • printed circuit heat exchangers
  • supercritical pressure reactors
  • MEMS
  • gas–liquid separator
  • experimental methods
  • flow visualization
  • numerical modeling
  • turbulence modeling
  • CFD applications
  • energy storage

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Published Papers (1 paper)

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Research

9 pages, 2858 KiB  
Article
Dynamics of Laser-Induced Shock Waves in Supercritical CO2
by Nika Asharchuk and Evgenii Mareev
Fluids 2022, 7(11), 350; https://doi.org/10.3390/fluids7110350 - 10 Nov 2022
Cited by 1 | Viewed by 1833
Abstract
We studied the dynamics of laser-induced shock waves in supercritical CO2 (scCO2) for different pressures and temperatures under nanosecond optical breakdown. We estimated the shock wave pressure and energy, including their evolution during shock wave propagation. The maximal shock wave [...] Read more.
We studied the dynamics of laser-induced shock waves in supercritical CO2 (scCO2) for different pressures and temperatures under nanosecond optical breakdown. We estimated the shock wave pressure and energy, including their evolution during shock wave propagation. The maximal shock wave pressure ~0.5 GPa was obtained in liquid-like scCO2 (155 bar 55 °C), where the fluid density is greater. However, the maximal shock wave energy ~25 μJ was achieved in sub-critical conditions (67 bar, 55 °C) due to a more homogeneous microstructure of fluid in comparison with supercritical fluid. The minimal pressure and energy of the shock wave are observed in the Widom delta (a delta-like region in the vicinity of the critical point) due to the clusterization of scCO2, which strongly affects the energy transfer from the nanosecond laser pulse to the shock wave. Full article
(This article belongs to the Special Issue Frontiers in Supercritical Fluids)
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