Thanh Hoang Phan

Thanh Hoang Phan
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Thanh Hoang verified their affiliation via an institutional email.
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Thanh Hoang verified their affiliation via an institutional email.
Case Western Reserve University | CWRU · Mechanical & Aerospace Engineering

Doctor of Philosophy
https://scholar.google.com/citations?user=ibxDyUwAAAAJ&hl=en

About

74
Publications
12,945
Reads
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825
Citations
Introduction
Dr. Thanh Hoang Phan holds the position of Postdoctoral Scholar at Case Western Reserve University. He earned both his Master's and PhD degrees in Mechanical Engineering from Pusan National University. Dr. Phan specializes in CFD, particularly in numerical modeling for multiphase flows involving heat and mass transfer such as boiling, condensation, thermal cavitation, and bubble dynamics. His research extends to the integration of machine learning techniques into multiphase flow analysis.
Additional affiliations
March 2015 - present
Pusan National University
Position
  • PhD Student
Education
March 2015 - February 2020
Pusan National University
Field of study
  • Mechanical Engineering

Publications

Publications (74)
Article
Full-text available
This paper presents a numerical exploration of shock waves and high-speed microjets induced by the collapse of bubbles near a wall in a pressurized liquid using a recently developed compressible multiphase flow model. The mathematical model utilized in this study ensures full conservation, which is a critical factor for faithfully representing shoc...
Article
Full-text available
In this study, complicated nonlinear interactions of a single laser-induced cavitation bubble inside a millimetric water droplet were numerically investigated using a fully compressible three-phase homogeneous model. A general condensation phase-change model and high-resolution interface-capturing schemes were adopted to accurately predict the bubb...
Article
The physics of wall shear stress and boundary layer flow from jetting cavitation bubbles on unheated and heated surfaces was investigated numerically using a homogeneous mixture model based on a fully compressible Navier–Stokes solver. A spatial–temporal shear stress map and velocity field on unheated surfaces under several standoffs were considere...
Article
Full-text available
In this study, we extensively validated the applicability of the fully conservative compressible multiphase flow model to simulate the collapse of cavitation bubbles. The mathematical model is fully conservative, which is crucial for accurately modeling the strong shock phenomena induced via bubble collapse. The numerical method accounts for compre...
Conference Paper
Cavitation and the collapse of cavitation bubbles have broad implications in areas beyond cavitation erosion, serving as valuable sources of energy for surface cleaning, material processing, biotechnology, and biomedical applications. The generation of high-speed jets, shock waves, and thermal effects during bubble collapses offers opportunities fo...
Chapter
In this work, we investigated the dynamics of a single cavitation bubble near a solid cylindrical rod with five different radii and a cylindrical rod with infinite radius (called here as flat plate) at different relative wall distances. First, we simulated dynamics of the cavitation bubble near a flat plate using a fully compressible model and vali...
Article
This paper presents a numerical study of the dynamics of an initially spherical bubble collapse near an oscillating rigid wall with a large amplitude; the wall oscillating amplitude is greater than 1% of the initial maximum bubble radius. Numerical simulations were conducted using a compressible two-phase flow model and the volume of fluid (VOF) in...
Article
Nowadays, with the widespread use of modern technology in underwater vehicles, particularly in naval applications, the artificial gas ejected from ventilated holes is normally heated because of engine operations. However, the dynamics of ventilated hot gas have not yet been fully studied. In this study, the cavitating flow around an axisymmetric bo...
Article
Full-text available
The growth, shedding, and collapse regime of cavitation under the effect of a free surface is complicated by projectiles moving near and across the free surface and three phases (air, liquid, and vapor due to evaporation) of a fluid. In this work, the flow behaviors of cavitation around projectiles moving beneath a free surface and exiting the free...
Conference Paper
Full-text available
In the issue of the cavitation erosions of devices/ systems that occur in the long-term operation in a wide range of hydraulic and industrial applications, such as propellers in ships, turbomachinery, automotive engines, control valves, fuel injectors, hydrodynamic cavitation reactors, materials processing, and so on. The cavitation damage strongly...
Conference Paper
Full-text available
The collapse of a bubble under an acoustic forcing presents a further complexity and plays a crucial role in the collapse intensity. In this study, a fully compressible multiphase model considering phase changes and non-condensable gas effects [1-2] is used to study the dynamic of microbubbles under an ultrasound field and their collapse intensity...
Article
Full-text available
Catastrophic failures of partially or fully submerged structures, e.g., offshore platforms, hydrokinetic turbine blades, bridge decks, etc., due to the dynamic impact of free surface flows such as waves or floods have revealed the need to evaluate their reliability. In this respect, an accurate estimation of hydrodynamic forces and their relationsh...
Article
In this paper, a free surface flow solver based on an improved coupling method for practical, highly nonlinear, complex free-surface flows is presented. The coupling method which is based on taking the advantages of the continuity and boundedness properties of the conservative level-set (LS) function and the mass conservation property of the VOF ap...
Article
Cavitation bubble dynamics include the releasing shock wave, violent jet impact, and extremely local high temperature at the collapse phase. Notably, in the case of a bubble collapsing near a rigid boundary, a high-velocity microjet toward structure is an important issue and significantly related to various engineering fields. A fully compressible...
Article
Full-text available
The dynamic behavior of bubble collapses, water jets, and pressure loads during the collapse of the bubble near walls and a free surface were numerically investigated via a geometrical volume of fluid (VOF)-based simulation method. The numerical method is based on the compressible Navier–Stokes equations in a conservative form that describe the flo...
Article
Full-text available
Thermodynamic characteristics and their effects on single cavitation bubble dynamics are important to elucidate the physical behaviors of cavitation phenomena. In this study, experimental and numerical methods were utilized to explore the thermodynamic effects on single cavitation bubble dynamics under various ambient temperature conditions. A seri...
Article
Full-text available
We propose a fully compressible multiphase model for simulating compressible interfacial flows. The mathematical model is formulated on the basis of the typical conservation laws for mixtures, including mass, momentum, and energy balance. The mass balance equation in each phase is considered to discretely conserve the mass of each phase; therefore,...
Conference Paper
In this study, a sinusoidal function has been implemented for the moving boundary condition modelling of a vibrating wall. Effects of boundary, standoffs, and frequency conditions on the bubble dynamics near a vibrating wall have been investigated. The results show that Bubble behaviours and wall impacts are affected by sound frequency level, stand...
Conference Paper
Fundamentals of bubble dynamics are important in various applications, such as ultrasonic lithotripsy, underwater explosions, explore the resource in the seabed, or the erosion that occurs at underwater impellers. A deep understanding of bubble dynamics near moving walls is essential and useful for design optimization for underwater vehicles [1]. T...
Conference Paper
In this study, dynamic behavior of bubble collapses, high-speed jets, and pressure loads during the bubble collapses near walls and a free surface are numerically investigated by using a geometrical volume of fluid (VOF) based simulation method. The numerical method is based on the compressible Navier-Stokes equations in the conservative form that...
Conference Paper
In this study, physical characteristics of supercavitation generated by high-temperature exhaust gas were numerically investigated. The hot gas in a range from 400 C o to 1000 C o was exhausted from the base of a shkval-shape projectile with a high velocity (approximately Ma = 2 in the air), while the velocity of the projectile is 120 m/s. The hot...
Article
Full-text available
In this study, we studied the dynamics of a laser-induced single cavitation bubble near a rigid cylindrical rod. We experimentally and numerically investigated the effects of the cylindrical rod on the dynamics of the growth and collapse of the single bubble at different relative wall distances. First, we performed the experiments using a high-spee...
Article
Full-text available
Influences of phase-change are generally ignored by current numerical models that are used to study spark-generated cavitation bubble dynamics. However, this assumption was limited to predicting bubble behaviors only at the first expansion and collapse stages. In this study, we aimed to explore the phase-change effects on the cavitation bubble dyna...
Conference Paper
Cavitation phenomenon has usually destructive effects on the marine propellers and rudders and on the components of hydraulic machinery systems. The cavitation-induced erosion can damage the surfaces of immersible bodies and reduce the performance of the ship and hydraulic systems. A single cavitation bubble near a solid surface can generate a high...
Preprint
We propose a fully compressible multiphase model for simulating compressible interfacial flows. The mathematical model is formulated on the basis of the typical conservation laws for mixtures, including mass, momentum, and energy balance. The mass balance equation in each phase is considered to discretely conserve the mass of each phase; therefore,...
Data
The numerical results of a small-charge underwater explosion near a bottom rigid wall are compared with experimental data by Cui et al. [1]. The single explosion bubble was generated by trinitrotoluene (TNT) with a weight of 5.2 g at a depth of 1.0 m and 0.19 m above the rigid plate. The initial radius and pressure are obtained by the Rayleigh-Ples...
Article
Full-text available
In this study, we numerically investigate the simultaneous thermodynamic and hydrodynamic mechanisms of underwater explosion (UNDEX). Bubble explosion in water at the collapsing stage is extremely violent and becomes extraordinarily hot, exceeding 1,000 K. The evolution of the bubbles and temperature fields are simulated using a fully compressible...
Preprint
Phase-change mechanisms are generally ignored by current numerical models that are used to explore spark-generated cavitation bubble dynamics. However, this assumption was limited to predicting bubble behaviors only at the first expansion and collapse stages. In this study, we aimed to explore the phase-change mechanisms and their effects on the ca...
Conference Paper
In naval application, torpedoes could be developed with the speed up to the speed of sound (underwater the speed of sound is approximate 1430 m/s). The transonic projectiles, typically between Mach 0.8 and 1.2, travel and create natural supercavitating flow with shock waves, phase change, and high-temperature regions. A solid understanding of the e...
Conference Paper
In this work, the flow structure of supercavitation around a submerged projectile beneath a free surface is investigated in detail using computational fluid dynamics. The supercavitating flow near the free surface is complicated by projectiles moving at high speeds and three phases including air, liquid, and vapor due to evaporation. The dual-time...
Conference Paper
Full-text available
This study aims to numerically analyze the dynamics of an underwater explosion bubble near a hemispheric boundary with emphasis on the wall pressure characteristics. The coupling of a fully compressible multiphase mixture model and an interface capturing scheme is applied for numerical computations. The accuracy of the numerical model is verified b...
Conference Paper
Full-text available
The objective of this study is to examine the flow field surrounding a cylinder with different cavitator shapes to validate the accuracy of a newly developed solver based on an open-source platform OpenFOAM. The developed solver is based on an improvement to a coupling technique for interface simulation, and an enhancement of the Merkel cavitation...
Article
The cavitating flow on a NACA0015 hydrofoil in water under a wide range of temperatures is simulated with or without non-condensation gas using a homogeneous model. Our simplified thermodynamic model is coupled with governing equations to capture the latent heat transfer in cavitation. A numerical evaluation proves its applicability through a compa...
Conference Paper
Full-text available
The numerical modeling of multiphase flows, especially compressible flows with the presence of interface and shock waves, is a challenging topic, which is still receiving increasing attention, particularly in engineering applications. In this study, we have developed an accurate shock-and interface-capturing method using curvilinear body-fitted str...
Article
Full-text available
An accurate shock- and interface-capturing method is introduced for simulations of compressible multiphase flows. First, an associated Godunov-type numerical scheme is established for a five-equation two-phase model obtained from a seven-equation model by assuming a single velocity and a single pressure between two phases. The computational finite-...
Article
Full-text available
In this study, an accurate shock- and interface-capturing method using curvilinear body-fitted structured grids is introduced to simulate compressible multiphase flows with shockwaves. A five-equation model—proficient in capturing unsteady shocks in compressible multiphase flows without nonphysical spurious oscillations—was enhanced by extending it...
Article
Full-text available
In this study, the complicated behavior of three-dimensional (3D) water entry problems of an oblique cylinder into water is investigated using a free surface model. An efficient free surface solver presented in a previous study for modeling ricochet problems (Nguyen et al., 2020b) is extended to the 3D numerical analysis of flow problems in the wat...
Article
Coupling techniques that take advantage of the mass conservation property of the volume-of-fluid (VOF) method and the sharpened interface computation of the Level Set (LS) approach are widely used for computations with high accuracy order demands. In this paper, an enhanced coupling method for interface computations in incompressible two-phase flow...
Article
Full-text available
In this study, strong nonlinear interactions of one and two underwater explosion bubbles with a free surface are numerically studied using an axisymmetrical fully compressible three-phase homogeneous model. The bubble interfaces and free surface are captured by solving two interface advection equations of vapor and air phases. The numerical results...
Conference Paper
Full-text available
Accurate interface simulation of the incompressible two-phase flows plays a prominent role in many problems in environmental and industrial applications such as prediction of propeller erosion based on cavity flow, ship resistance based on wave profile in ship building industry, evaluation of potential risks of the rupture of levees, dams and reser...
Article
Full-text available
Here, an unsteady natural cavitating flow around an axisymmetric projectile is computationally studied using a homogeneous multiphase approach. The numerical models used are based on a dual-time preconditioning method, an interface-capturing scheme, and a modified cavitation model, to capture unsteady cavitation structure behaviors. Full compressib...
Presentation
Full-text available
➢ Develop a general cavitation model with thermal effects and integrate with Navier-Stocks equations solving for compressible multiphase flows. ➢ Application for simulation, analysis, and evaluation of thermodynamic mechanisms of natural/ventilated cavitation flows and bubble collapse. ➢ The developed in-house code tool can be applied to in-depth a...
Article
Full-text available
In this paper, the enhancement and application of the recently developed two-phase flow model for the simulation of ricochet and penetration of water entry bodies are presented. The simple two-phase three-equation model, which is a reduced version of the full two-fluid model for compressible multiphase flows, is extendedly applied. The numerical pr...
Article
Heat transfer during subcooled flow boiling has a pivotal role in pressurized water reactors; it also occurs in boiling water reactors prior to the onset of saturated nucleate boiling. We examined the condensation behavior of vapor bubbles in the subcooled liquid phase using the fully compressible two-phase homogeneous mixture method, solved by an...
Conference Paper
Full-text available
The multiphase flow is a vast topic in diverse fields of science and technology. Water entry impact forces, supercavitation, and underwater explosion are important topics for various engineering problems. The development of accurate and efficient numerical algorithms for the multi-phase flow simulations is still receiving increasing attention, part...
Conference Paper
Full-text available
This study is concerned with the nonlinear interaction between a spark-generated bubble and a free surface. The numerical method is based compressible three-phase mixture mode coupled with solving two interface advection equations. Good agreement with experimental data is obtained regarding bubble-and free surface shape. From the obtained results,...
Conference Paper
Full-text available
This work is devoted to numerical simulations of compressible two-phase gas-gas and gas-liquid flows in the presence of shock wave using a diffuse interface method. A monotonic upstream-centered scheme for conservation laws (MUSCL)/Godunov-type finite volume Riemann scheme is used for discretization of the five-equation model. This model is reduced...
Conference Paper
Full-text available
The present work is dedicated to modeling and application of numerical approaches for simulation of free surface and water entry of bodies. A preliminary evaluation of numerical models for simulation of complex, free surface, and water impact problems was performed. The dual-time, pseudo-compressibility method is adopted in order to solve the Navie...
Article
Full-text available
In this work, a simple and efficient three-equation two-phase model is transformed to a multi-dimensional general curvilinear coordinate system for simulation of free surface and water impact flows on curvilinear body-fitted grids. The two-phase model is a reduced version of the Baer–Nunziato model for compressible multiphase flows, in which the go...
Article
Full-text available
A compressible homogeneous mixture model was adopted to numerically investigate the dynamics of an underwater explosion bubble. The bubble-water interfaces were captured by solving an interface advection equation using a compressive high-resolution interface capturing method. The numerical model was validated by comparison with experimental results...
Conference Paper
Full-text available
The research of underwater explosion is an important topic in various engineering problems, especially in military fields. The local dynamic motion of an explosion bubble is the most serious and complex process mainly characterized by bubble expansion, collapse, jet impact, and upward migration. This paper aims to numerically study the bubble dynam...
Conference Paper
In this paper, we presented numerical results for steam-air mixture jet condensation flows in quiescent subcooled water. High-speed multiphase flow involve heat and mass transfer via the interfaces was simulated using a couple of fully compressible three-phase homogeneous mixture model and two interface advection equations. The simulation results i...
Conference Paper
Full-text available
This paper presents one-dimensional(1-D) numerical simulations of subcooled boiling flows in a heated vertical pipe using homogeneous mixture model. The fully compressible multi-phase homogeneous Reynolds-averaged Navier–Stokes equations are used. The model is based on the conservation of mass for individual phases, whereas the conservation of mome...
Conference Paper
Full-text available
Flashing flow is encountered in many industrial applications in the process industry such as nuclear reactors and chemical reactors. The calculations of flashing flows of water in a circular nozzle are carried out. The fully compressible three-phase homogeneous Navier Stokes equations and Lee’s boiling model are used. Sensitivity analysis of empiri...

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