Zhan-Chao Hu

Zhan-Chao Hu
Sun Yat-Sen University | SYSU · Department of Applied Mechanics and Engineering

Doctor of Philosophy

About

28
Publications
866
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
67
Citations
Citations since 2017
27 Research Items
67 Citations
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
2017201820192020202120222023051015202530
Education
September 2011 - June 2015
Tianjin University
Field of study
  • Thermal Energy and Power Engineering

Publications

Publications (28)
Article
Full-text available
This paper analyzes the characteristics of convective heat transfer of a pulse-heated platinum microwire cooling in CO2 under supercritical pressures based on experimental data. The microwire undergoes a rapid temperature rise of around 664 K within 0.35 ms. An inverse problem is formulated and numerically solved to extract heat transfer data from...
Article
Full-text available
This paper reports our experimental findings aimed to understand the importance of compressibility in fluid flow and heat transfer. A platinum microwire of diameter 50 μm was immersed in a pressure vessel filled with CO2 at different thermodynamic states around the critical point. The microwire was heated by an electric pulse resulting in a tempera...
Chapter
Full-text available
This chapter enters the second part of this thesis, where a hydrodynamic instability problem is studied and coupled heat and mass transfer exists through cross-diffusion effects. In this chapter, theoretical tools are implemented to study the Rayleigh-Bénard instability in a binary mixture at supercritical pressures, which is characterized by gravi...
Chapter
Full-text available
This chapter also belongs to the first part of this thesis, where a diffusion problem is studied and coupled heat and mass transfer exists through cross-diffusion effects. The steady-state responses of an enclosed binary mixture subjected to transcritical temperature differences under supercritical pressures are numerically simulated to study the c...
Chapter
Full-text available
General backgrounds and basic concepts are introduced in this chapter, including critical phenomenon, critical anomalies, and the applications of supercritical pressure fluids. The coupled heat and mass transfer is explained briefly. A literature review is also provided, followed by the motivation and outline of this book.
Chapter
Full-text available
This chapter also belongs to the second part of this thesis. Based on the previous chapter, this chapter investigates the bifurcation around the onset threshold, with special attention paid to the conditions of finite-amplitude (FA) instability. The coupled heat and mass transfer exists through cross-diffusion effects. By means of weakly nonlinear...
Chapter
In this thesis, fundamental transport phenomena and related effects in binary mixtures at supercritical pressures are explored, where coupled heat and mass transfer exists via cross-diffusion effects or temperature-dependent boundary reactions. The main conclusions are summarized as in this chapter.
Chapter
Full-text available
This chapter enters the first part of this thesis, where a relaxation problem is studied and coupled heat and mass transfer exists through cross-diffusion effects. This chapter is devoted to reporting the mass piston effect induced by the cross-boundary mass flux in a binary mixture under supercritical pressures. Mass piston effect is driven by thr...
Chapter
Full-text available
This chapter enters the third part of this thesis, where a cavity flow problem is studied and coupled heat and mass transfer exists through temperature-dependent boundary reactions. For a supercritical solvent–solute system, as a critical end point (CEP) is approached, the solubility becomes sensitive to temperature variations. By virtue of this ph...
Chapter
Full-text available
As a basis of this thesis, this chapter describes the fluid dynamic and thermophysical modelings of a reference binary mixture. The aim of this chapter is twofold: paving the way for later chapters and help readers understand the features of the reference binary mixture.
Book
Supercritical pressure fluids have been exploited in many engineering fields, where binary mixtures are frequently encountered. This book focuses on the coupled heat and mass transfer in them, where the coupling comes from cross-diffusion effects (i.e., Soret and Dufour effects) and temperature-dependent boundary reactions. Under this configuration...
Article
Recent publications have shown the effectiveness of the analogy between fluids at sub-and supercritical pressures and confirmed there is a distinguishable crossover between liquid-like and gas-like behavior in supercritical fluids. This work is devoted to extending such an analogy to miscible zeotropic binary mixtures , whose well-known feature in...
Article
We study the characteristics of temperature fluctuation in two-dimensional turbulent Rayleigh–Bénard convection in a square cavity by direct numerical simulations. The Rayleigh number range is 1 × 10 ⁸ ≤ Ra ≤ 1 × 10 ¹³ , and the Prandtl number is selected as Pr = 0.7 and Pr = 4.3. It is found that the temperature fluctuation profiles with respect t...
Article
Full-text available
It is well-known that for the onset of Rayleigh–Bénard (RB) convection in a binary mixture with Soret effect and negative separation ratio, the competitions between temperature and concentration gradients can lead to oscillatory instability. In this paper, through linear stability analysis, a new oscillatory instability is discovered in a binary mi...
Article
For a supercritical solvent–solute system, as a critical end point (CEP) is approached, the solubility becomes sensitive to temperature variations. By virtue of this phenomenon, a conceptual model is proposed to combine extraction and crystal growth. CO2–naphthalene is chosen as the reference system. Theoretical optimizations suggest that the newly...
Article
In this paper, we study the thermalization process of an enclosed fluid mixture near its liquid-vapor critical point subjected to cross-boundary mass diffusion. We reveal that the mass piston effect, a fast and efficient thermalization phenomenon can take place, as a result of three cooperative or competing mechanisms: the boundary velocity, the Du...
Article
The nonlinear oscillatory double-diffusive convection in a thermodynamically near-critical binary fluid layer is investigated to explore the interactions between the piston effect and natural convection in the presence of subcritical bifurcation. The bifurcation diagram of the system is studied. Two subcritical bifurcation branches are depicted, wh...
Article
Near the thermodynamic critical point, the physical properties of binary fluids exhibit large variations in response to small temperature and concentration differences, whose effects on the onset of double-diffusive convection are reported here. The vertical symmetry is broken, irregular penetrative instability occurs, and cat's eye patterns are id...
Article
We apply equilibrium molecular dynamic simulations for investigating the infinite dilution diffusivity of carbon dioxide in near- and supercritical water (SCW) over the wide temperature ranging from 647 to 973 K at 115, 217, 426 and 663 kg/m³. The diffusion coefficients of SCW and infinite dilution diffusion coefficients (IDDCs) of carbon dioxide a...
Article
A linear stability analysis is conducted for the onset of natural convection driven by a concentration gradient in a horizontal layer of a near-critical binary fluid mixture. The problem is regarded as a limiting case of double-diffusive convection. The governing equations for small perturbations after normal-mode expansion are solved numerically w...
Article
This article studies the natural convection in near-critical fluids under the Rayleigh–Bénard configuration. The governing equations are non-dimensionalized by using modified scaling factors and five dimensionless parameters are determined, out of which the specific heat ratio γ is investigated thoroughly in terms of its influences on the convectio...
Article
This paper describes an improved decoupling algorithm for calculating low Mach number near-critical fluid flows, in which the cp-formulation of the energy equation is used (cp refers to the specific heat at constant pressure) and the pressure–velocity coupling is treated through the block-coupled method, together with a transformation of the contin...
Article
Near the liquid-vapor critical point, strong anomalies in thermodynamic and transport properties induce the piston effect. In the present study, the piston effect is investigated in spherical cells filled with near-critical fluids under zero gravity and small thermal disturbance conditions by numerically solving the thermodynamic model. The results...

Network

Cited By