Ming-Chang Lu

Ming-Chang Lu
National Taiwan University | NTU · Department of Mechanical Engineering

PhD

About

47
Publications
8,422
Reads
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2,268
Citations
Additional affiliations
August 2019 - January 2021
National Taiwan University
Position
  • Professor
August 2014 - present
National Chiao Tung University
Position
  • Professor
July 2002 - July 2006
Industrial Technology Research Institute
Position
  • Research Associate
Education
August 2006 - July 2010
University of California, Berkeley
Field of study
  • Mechanical Engineering

Publications

Publications (47)
Article
The increase in the number of transistors in electronic circuits has increased the power density of electronic devices, which leads to the formation of hotspots on the microchips of the electronic devices. Hotspots deteriorate the lifespan and reliability of electronic devices. With the advantages of high thermal conductivity (κ), low cost, and fea...
Article
Reducing the contact time (tc ) of a droplet impacting a solid surface is crucial in various fields. Superhydrophobic (SHB) surfaces are used to reduce tc at room temperature. However, at high temperatures, SHB surfaces cannot achieve tc reduction because of the failure of the coating materials or the Leidenfrost (LF) effect. Therefore, a surface t...
Article
Copper nano-interconnects are ubiquitous in semiconductor devices. The electrical and thermal properties of copper nanowires (CuNWs) profoundly affect the performance of electronics. In contrast to the intensively studied electrical properties of CuNWs, the thermal conductivities of CuNWs have seldom been examined. In this study, the electrical res...
Article
Fouling causes numerous adverse effects on various types of systems. In addition, clean fouling on a solid surface is cost-intensive and time-consuming. Superhydrophobic (SHB) surfaces with a water-repellent property can potentially be used for antifouling. However, SHB surfaces lose their antifouling property at high temperatures because of the fa...
Article
Ice formation on various surfaces causes catastrophic consequences or enormous economic losses. Superhydrophobic surfaces with extreme water repellency were applied for removing ice efficiently; however, their practical applications are hindered by the fabrication of the complicated micro/nanostructures of the surfaces. In this work, we proposed us...
Article
Polymers are generally regarded as thermal insulators. The efficient heat transfer observed in the low-dimensional polymers in the literature mainly result from the larger crystallinity or improved polymer chain orientation in the low-dimensional polymers. However, the role of the amorphous domain on heat transfer in polymers remains to be unexplor...
Article
The ‘Solar salt’ (60% NaNO3-40% KNO3, wt. %) is the most used heat transfer and storage material in high temperature CSP systems. The main drawback is its high melting temperature of 228 °C, which requires extra-energy to keep it in the liquid state and avoid damage to pipes at low temperatures. Multi-component salts are combinations of different c...
Article
Drop impacting on a superheated surface is of practical concern in several thermal systems. When the surface temperature is higher than the Leidenfrost point (LFP), a stable vapor cushion forms on the solid surface and the drop hovers over the thin vapor layer. This results in a drastic reduction in heat and mass transfer due to the thermally insul...
Article
Given the self-unbridging phenomenon, the confined liquid-film thickness, and the dragging motion observed on the 3D hybrid surfaces, enhanced condensation heat transfer on the 3D hybrid surface over a large subcooling (ΔTsub) range was achieved. In addition, the obtained heat flux of 655 ± 10 kW·m⁻² at ΔTsub ∼18 K exceeded the values in the litera...
Article
Fast drop bouncing is desired in numerous applications. However, it has never been realized on a superheated surface with concurrent contact boiling and the Leidenfrost effect (the so-called Janus thermal state). This is presumably because of the increased drop adhesion as a result of bubbling on a Janus surface. Nevertheless, on a hydrophilic SiNx...
Article
We report experimental studies of the role of easy-to-activate nucleation sites in pool boiling on hybrid hydrophobic-hydrophilic surfaces. Microstructured surfaces with controlled wettability and nucleation sites are designed and fabricated to investigate their individual and collective effects on the boiling heat transfer performance. Our results...
Article
Thermal hysteresis (TH) is defined as the temperature difference between the melting points and crystallization temperatures of phase-change materials (PCMs). The magnitude of the TH is proportional to the energy loss in a system. In addition, the latent heats of the PCMs cannot be exploited if the TH is beyond the operation temperature range of a...
Article
Continual increases in the functionality and miniaturization of electronic devices have resulted in a rapid increase in the power density of such devices. Thus, an efficient cooling technology is required to maximize heat dissipation and prevent electronic failure. Immersion cooling is a promising technique for the thermal management of high-power-...
Article
Condensation is an essential process in various industrial systems. Enhancing condensation by employing superhydrophobic (SHB) surfaces had drawn significant attention in recent years because of the emerging technology for surface engineering. However, the efficacy of SHB surfaces in condensation is controversy in the literature. The observed deter...
Article
Ice formation is a catastrophic problem affecting our daily life in a number of ways. At present, deicing methods are costly, inefficient, and environmentally unfriendly. Recently, the use of superhydrophobic surfaces has been suggested as a potential passive anti-icing method. However, no surface is able to repel frost formation at a very cold tem...
Article
Silicon nanowire possesses great potential as the material for renewable energy harvesting and conversion. The significantly reduced spectral reflectivity of silicon nanowire to visible light makes it even more attractive in solar energy applications. However, the benefit of its use for solar thermal energy harvesting remains to be investigated and...
Article
Micro/nano (two-tier) structures are often employed to achieve superhydrophobicity. In condensation, utilizing such a surface is not necessarily advantageous because the macroscopically observed Cassie droplets are usually in fact partial Wenzel in condensation. The increase in contact angle through introducing microstructures on such two-tier roug...
Article
Full-text available
We demonstrated enhanced solar-thermal storage by releasing the latent heat of Sn/SiOx core-shell nanoparticles (NPs) embedded in a eutectic salt. The microstructures and chemical compositions of Sn/SiOx core-shell NPs were characterized. In situ heating XRD provides dynamic crystalline information about the Sn/SiOx core-shell NPs during cyclic hea...
Article
Condensation is a common phenomenon and is widely exploited in power generation and refrigeration devices. Although drop-wise condensation offers high heat and mass transfer rates, it is extremely difficult to maintain and control. In this study, the ability to spatially control heterogeneous nucleation on a superhydrophobic surface by manipulating...
Article
Full-text available
There is no consensus on the effect of nanoparticle (NP) addition on the specific heat capacity (SHC) of fluids. In addition, the predictions from the existing model have a large discrepancy from the measured SHCs in nanofluids. We show that the SHC of the molten salt-based alumina nanofluid decreases with reducing particle size and increasing part...
Article
In this study, the influences of heat flux and mass flux on the two-phase convective boiling heat transfer performance are reported for refrigerants HFO-1234yf and HFC-134a in a 3.9 mm smooth diameter tube. Tests are performed with a saturation temperature of 10 �C. It is found that at lower vapor quality region the nucleate boiling is the dominant...
Article
Understanding protein adsorption onto solid surfaces is of critical importance in the field of bioengineering, especially for applications such as medical implants, diagnostic biosensors, drug delivery systems, and tissue engineering. This study proposed the use of molecular dynamics simulations with potential of mean force (PMF) calculations to id...
Article
Biporous media consisting of microscale pin fins separated by microchannels are examined as candidate structures for the evaporator wick of a vapor chamber heat pipe. The structures are fabricated out of silicon using standard lithography and etching techniques. Pores which separate microscale pin fins are used to generate high capillary suction, w...
Article
Cavitation, known as the formation of vapor bubbles when liquids are under tension, is of great interest both in condensed matter science as well as in diverse applications such as botany, hydraulic engineering, and medicine. Although widely studied in bulk and microscale-confined liquids, cavitation in the nanoscale is generally believed to be ene...
Conference Paper
We present detailed data on the performance of microstructured geometries for use in the evaporator section of a vapor chamber heat pipe. The central innovation of the geometries is their hierarchical structure, involving the use of large microchannels in order to reduce liquid flow drag while fabricating microscale pin fin arrays whose small pores...
Conference Paper
Cavitation refers to a nucleation phenomenon that occurs at room temperature when the liquid pressure is below the corresponding saturation vapor pressure. Although water confined by a nanochannel and a liquid-air meniscus is under negative pressure, i.e. much smaller than the corresponding satraton vapor pressure, cavitation has not been observed...
Article
Boiling is a common mechanism for liquid-vapor phase transition and is widely exploited in power generation and refrigeration devices and systems. The efficacy of boiling heat transfer is characterized by two parameters: (a) heat transfer coefficient (HTC) or the thermal conductance; (b) the critical heat flux (CHF) limit that demarcates the transi...
Article
Molecular Dynamics simulations are performed to calculate the thermal conductivity of nanofluids, and to understand the fundamental physics of the enhancement of thermal conductivity observed in experiments. Based on the analysis, intermolecular interactions between copper-copper atoms, layer structure surrounding nanoparticles, convection effect i...
Article
This study numerically examines the influence of inlet locations on the performance of the Multichannel cold-plates. A total of five inlet configurations (namely I-, Z-, ]-, L-, and Γ-arrangement) are investigated in this study. The velocity maldistribution and nonuniformity of temperature field caused by the fluid flow are shown in the simulation....
Article
This study numerically examines the influence of inlet locations on the performance of the Multichannel cold-plates. A total of five inlet configurations (namely I-, Z-,]-, L-, and Gamma-arrangement) are investigated in this study. The velocity mald- istribution and nomuniformity of temperature field caused by the fluid flow are shown in the simula...
Article
This study conducts an analytical and experimental investigation associated with energy transfer by using a nano-porous membrane. The calculated results indicate that the streaming potential held at a saturated value when the electrolyte concentration is below a certain critical value. After passing this threshold value, the streaming potential dec...
Conference Paper
This study examines the flow mal-distribution and nonuniformity of temperature field of a cold-plate. The calculated results indicate the mal-distribution is decreased when the number of channels in the cold-plate is increased. For the present impingement flow arrangement, the mal-distribution increases with the flow rate. The cold-plate with a flo...
Article
Full-text available
This paper proposes the design of a passive micromixer that utilizes the self-circulation of the fluid in the mixing chamber for applications in the Micro Total Analysis Systems (μTAS). The micromixer with a total volume of about 20 µL and consisting of an inlet port, a circular mixing chamber and an outlet port was designed. The device was actuate...
Conference Paper
This study examines the thermofluids characteristics of a LED lighting device. It is found that the heat sources of the present LED lighting are from the PCB and from the LED itself. To effectively improve the overall performance of the LED device, it is suggested that these two heat sources should be dealt with separately. For efficient thermal ma...
Article
This study reports that the success of reservoir-filling strongly depends on the designs of the hydrophilic wall surface and the well shape/size of the flow network. The idea is illustrated both by experiments and numerical simulations: micro-particle-image-velocimetry (μ-PIV) system is setup to monitor the process of a liquid slug moving in and ou...
Article
Molecular dynamics simulations related to the contact structure of liquid droplet on a solid surface are compared for a simple Lennard-Jones fluid system and a practical water-on-platinum system. The contact angle for the Lennard-Jones system seems to be simply scaled with the potential energy parameter between liquid and solid, even though the lay...
Conference Paper
Liquid flow passes through two parallel plates are simulated using molecular dynamic method. The flowing systems consist of 2744, 5488, and 8232 Argon molecules inside channels with heights of 40Å, 80Å, and 120Å respectively and the liquid Argon is sandwiched between two solid walls. The wall is comprised of fcc surface of 510 platinum molecules. T...
Article
This dissertation presents a study exploring the limits of phase-change heat transfer with the aim of enhancing critical heat flux (CHF) in pool boiling and enhancing thermal conductance in heat pipes. The state-of-the-art values of the CHF in pool boiling and the thermal conductance in heat pipes are about two orders of magnitudes smaller than the...

Projects

Projects (10)
Project
Dear Colleagues, We are pleased to invite you to the 13th Conference on Sustainable Development of Energy, Water and Environment Systems – SDEWES Conference, to be held September 30 - October 4, 2018 in “Splendid Hotel La Torre” hotel in Palermo, Italy. SDEWES Conference is dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development. Thus, SDEWES2018 will be an essential venue for researchers in those areas to meet, and originate, discuss, share, and disseminate new ideas. Please visit and explore our conference website at http://www.palermo2018.sdewes.org/ and do not hesitate to contact us via the official conference email:sdewes2018@sdewes.org. SDEWES2018 will bring you invited lectures from prominent experts in the field, panels and poster sessions as well as technical visits and a rich social programme. Presenting a paper on SDEWES2018 is also a great way to get your paper published in special issues of our partner journals. Register here for the Conference and don't miss out information and updates about SDEWES2018. Kind regards, Prof. Neven Duić, Conference Co-Chair, University of Zagreb SDEWES2018 Organizing Committee
Archived project
Dear Colleagues, We are pleased to invite you to the 3rd South East Europe Conference on Sustainable Development of Energy, Water and Environment Systems – SEE SDEWES Conference, to be held June 30 – July 03, 2018 in Hotel Park Novi Sad in Novi Sad, Serbia. SEE SDEWES Conference is dedicated to the improvement and dissemination of knowledge on methods, policies and technologies for increasing the sustainability of development. Thus, 3rd SEE SDEWES Confrence will be an essential venue for researchers in those areas to meet, and originate, discuss, share, and disseminate new ideas. Please visit and explore our conference website at www.novisad2018.sdewes.org and do not hesitate to contact us via the official conference email: see2018@sdewes.org. 3rd SEE SDEWES will bring you invited lectures from prominent experts in the field, panels and poster sessions as well as technical visits and a rich social programme. Presenting a paper on 3rd SEE SDEWES is also a great way to get your paper published in special issues of our partner journals. Register here for the Conference and don't miss out information and updates about 3rd SEE SDEWES. Kind regards, Prof. Neven Duić, Conference Co-Chair, University of Zagreb 3rd SEE SDEWES Organizing Committee Date: 30 June 2018 - 03 July 2018