Mengjie SONG

Mengjie SONG
Beijing Institute of Technology | BIT · School of Mechanical Engineering

PhD; Heat and Mass Transfer
Call for postdocs (0.4-0.5 million RMB per year), phd students... 诚挚邀请博士、博士后(年薪40-50万元人民币!)和研究员加入我们复杂流体相变热力学研究团队!

About

262
Publications
30,200
Reads
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5,942
Citations
Introduction
Prof. SONG MJ focuses on the mechanism study of heat and mass transfer coupled with the flow, including frosting, defrosting, and boiling, etc. Frost Lab: https://frostlab2020.wixsite.com/frostlab
Additional affiliations
October 2019 - present
Beijing Institute of Technology
Position
  • Professor
Education
November 2011 - March 2015
The Hong Kong Polytechnic University
Field of study
  • Heat transfer

Publications

Publications (262)
Article
Full-text available
The present research investigated two drying systems for Panax-notoginseng (PNG) root, namely the hybrid indirect solar-electric drying (HISED) and oven drying (OD) to reach the desired moisture level in 13-6 h and 16-9 h at drying temperatures ranging from 60 to 90 • C, respectively. Increasing drying temperature increased the diffusivity of PNG s...
Article
Full-text available
Surface design by tailoring topographical features and interface function groups to modulate dynamic or kinetic behaviors of liquid droplets, has been an increasing hotspot due to its broad spectrum of applications in biochemical diagnosis, microfabrication, and energy conversion systems. Here we report an engineered surface decorated by packed nan...
Article
Full-text available
Frosting widely exists in engineering applications and mostly has negative impacts. To better avoid or utilize frosting, more micro and systematic investigations into the frosting mechanisms are necessary. In this study, the combined effect of humidity and plate edge on droplet dynamic and the subsequent frost growth characteristics of a horizontal...
Article
Full-text available
The frosting phenomenon poses a potential threat to both industrial production and daily life. Typically, a frost layer consists of frost crystals that grow on various micro-sized frozen droplets, and its development is signifi- cantly affected by the frost crystal behaviors. To better understand the frosting mechanism, a series of experi- ments ar...
Article
The thermal performances and quality attributes of dried onion using stationary solar-electric drying (SED), intermittent solar-electric drying (ISED), and intermittent solar-electric drying with sensible storage medium (ISEDS) were compared. The tempering in processing time by 60 min elevated the drying time and reduced the diffusivity from 3.67 ×...
Article
There is a perforated fin that is widely used in air source heat pump units due to its outstanding heat transfer efficiency. An emerging low-cost method of frost suppression is to reduce relative humidity by placing a wire mesh. Perforated fin and wire mesh can be reduced to an aperture plate. To investigate the influence of relative humidity on th...
Article
Full-text available
The droplet impact process on a conical tip is one of the key problems in the field of fluid mechanics and surface and interface science. This study examines the impact process of water droplets on the conical tip using experimental, numerical, and theoretical approaches. The volume of fluid method and the dynamic contact angle model are used and v...
Article
To reduce the negative impact of frost formation on cold surfaces in low-temperature environments, metal wire mesh can be set in the air flow direction from the cold surface to reduce air humidity. To quantitatively determine the effectiveness of dehumidification after passing through a metal wire, the frosting process needs to be studied. To analy...
Article
Full-text available
Reliable and comprehensive predictive tools for the frictional pressure drop (FPD) are of particular importance for systems involving two-phase flow condensation. However, the available models are only applicable to specific operating conditions and channel sizes. Thus, this study aims at developing universal models to estimate the FPD during conde...
Article
Icing is a phenomenon that exists widely in daily life and industry, and always brings some disadvantages. The dissolved air tends to become micro bubbles and trapped in ice, which have an effect on the physical properties of the ice. To explore the distribution and growth characteristics of trapped air bubbles in ice, experiments are carried out i...
Preprint
Full-text available
Reliable and comprehensive predictive tools for the frictional pressure drop (FPD) are of particular importance for systems involving two-phase flow condensation. However, the available models are only applicable to specific operating conditions and channel sizes. Thus, this study aims at developing universal models to estimate the FPD during conde...
Article
Biodiesels offer viable alternatives to fossil diesels as renewable and clean energy sources. Understanding the thermal conductivity of biodiesels is crucial for engine design and heat transfer rate calculations in thermal systems. However, existing literature lacks validated predictive tools for this property. To address this, a study utilized 255...
Article
This study aimed to make a progress in the modeling of frost layer characteristics during natural convection on vertical and inverted cold surfaces, by directing focus towards the physical steps of frosting process. The modeling phase was relying on four enormous experimental datasets, embracing, (a) 727 data for frost thickness on vertical plates,...
Article
Icing is a complex phase change process that is widespread in nature and industry and may have a number of negative effects. During the freezing of water into ice, air bubbles are often trapped in ice and affect the physical properties of the ice. To control the icing process, it is necessary to study these air bubbles in ice. Here, an experimental...
Article
Full-text available
Wide-bandgap gallium nitride (GaN)-based semiconductors offer significant advantages over traditional Si-based semiconductors in terms of high-power and high-frequency operations. As it has superior properties, such as high operating temperatures, high-frequency operation, high breakdown electric field, and enhanced radiation resistance, GaN is app...
Article
The wetting properties of droplets on microstructure surfaces directly determine the hydrophobic properties of the surface, and the size effect is an important part of the study of droplet wettability on microstructure surfaces. Taking reentrant special-shaped microstructure and doubly-reentrant special-shaped microstructure as the research objects...
Article
Biochar, a carbon-rich and por ous material derived from waste biomass resources, has demonstrated tremendous potential in wastewater treatment. Torrefaction technology offers a favorable low-temperature biochar production method, and torrefied biochar can be used not only as a solid biofuel but also as a pollutant adsorbent. This review compares t...
Article
Full-text available
Cooling methods for multiple heat sources with high heat flux have rarely been reported, but such situations threaten the stable operation of electronic devices. Therefore, in this paper, the use of two microchannel heat sinks is proposed, with and without grooves, labeled Type A and Type B, respectively. Experimental investigations on the flow boi...
Article
Full-text available
This paper proposes an innovative framework of a parameter estimation procedure based on the well-established relay-feedback experiment paradigm. The novelty consists in consideration of asymmetric dynamics and non-equal static gains of the identified system. A different system behavior after changing the input variable polarity near the operating...
Article
Full-text available
The aim of this research is to revise and substantially extend experimental modelling and control of a looped heating-cooling laboratory process with long input-output and internal delays under uncertainties. This research follows and extends the authors' recent results. As several significant improvements regarding robust modelling and control hav...
Article
Icing on cold surfaces is ubiquitous in many natural and engineering processes, and various icing models have been proposed with little advice given on model selection. Here, we calculate the ice accretion characteristics using property-constant and property-variable icing models under different airflow parameters. The ice thickness, water film thi...
Article
When an air source heat pump (ASHP) operates at low ambient temperature and high relative humidity, its outdoor coil faces frosting problem. Defrosting becomes necessary and reverse cycle defrosting (RCD) has drawn extensive attention due to its specific advantages. To fully understand the research trends of defrosting topic and further improve the...
Article
Considering frosting process in applications usually starts along with cooling stage of the corresponding frosting components, a systematic study on the impacts of the initial cooling rate on the frosting characteristics in an edge zone of a cold plate is conducted. The experimental plate surface temperature, air temperature, relative humidity, and...
Article
To retard the negative effects of frosting, it is necessary to better understand the frosting mechanism on cold surfaces. In this study, a systematical study on the dynamic frosting characteristics on the edge zone of a horizontal copper plate under forced convection was conducted. The results showed that the air velocity effect and edge effect on...