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Study on forced air convection cooling for electronic assemblies

LI Bin, TAO Wenquan, HE Yaling

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 158-163 doi: 10.1007/s11708-008-0009-2

Abstract: The slotted fin concept was employed to improve the air cooling performance of plate-fin in heat sinks. Numerical simulations of laminar heat transfer and flow pressure drop were conducted for the integral plate fin, discrete plate fin and discrete slotted fin heat sinks. It is found that the performance of the discrete plate fin is better than that of the integral continuum plate fin and the performance of slotted fin is better than that of the discrete plate fin at the same pumping power of the fan. A new type of heat sink characterized by discrete and slotted fin surfaces with thinner fins and smaller spaces between fins is then proposed. Preliminary computation shows that this type of heat sink may be useful for the next generation of higher thermal load CPUs. The limit of cooling capacity for air-cooling techniques was also addressed.

Keywords： concept     slotted     air-cooling     Preliminary computation     generation    

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Thermally developing forced convection and the corresponding thermal stresses in a porous plate channel

YANG Xiao, LIU Xuemei

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 57-61 doi: 10.1007/s11465-007-0009-7

Abstract: pore fluid flow and thermal conduction in the direction of the fluid flow, the thermally developing forcedconvection of the local thermal equilibrium and the corresponding thermal stresses in a semi-infinite

Keywords： semi-infinite saturated     direction     interaction     skeleton     thermal equilibrium    

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An invariant descriptor for conjugate forced convection-conduction cooling of 3D protruding heaters in

Thiago ANTONINI ALVES,Paulo H. D. SANTOS,Murilo A. BARBUR

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3,   Pages 263-276 doi: 10.1007/s11465-015-0345-y

Abstract: defined in this study as the conjugate influence coefficients (g+) caused by the forcedconvection-conduction nature of the heaters’ cooling process.

Keywords： channel flow     conjugate forced convection-conduction cooling     conjugate influence coefficients     discrete    

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Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater

Foued CHABANE,Nesrine HATRAF,Noureddine MOUMMI

Frontiers in Energy 2014, Volume 8, Issue 2,   Pages 160-172 doi: 10.1007/s11708-014-0321-y

Abstract: This paper presents an experimental analysis of a single pass solar air collector with, and without using baffle fin. The heat transfer coefficient between the absorber plate and air can be considerably increased by using artificial roughness on the bottom plate and under the absorber plate of a solar air heater duct. An experimental study has been conducted to investigate the effect of roughness and operating parameters on heat transfer. The investigation has covered the range of Reynolds number from 1259 to 2517 depending on types of the configuration of the solar collectors. Based on the experimental data, values of Nusselt number have been determined for different values of configurations and operating parameters. To determine the enhancement in heat transfer and increment in thermal efficiency, the values of Nusselt have been compared with those of smooth duct under similar flow conditions.

Keywords： Nusselt number     flow rate     heat transfer     heat transfer coefficient     thermal efficiency     forced convection    

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MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer

Hulin HUANG, Xiaoming ZHOU,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 155-160 doi: 10.1007/s11708-009-0063-4

Abstract: different directional magnetic fields on critical temperature differences of oscillatory thermocapillary convectionshow that all the magnetic fields along the , and directions can delay the transition from steady convectionto oscillatory convection, and critical temperature differences increase with an increasing Hartmann

Keywords： magnetohydrodynamic     magnetic fields     thermocapillary convection     critical temperature difference     oscillatoryconvection     two-layer fluid system    

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An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal

Qi WEI, Xiaohui ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 507-516 doi: 10.1007/s11708-010-0017-x

Abstract: Thermal convection of viscoelastic fluids saturating a horizontal porous layer heated from below is analyzedThe effects of interphase heat transfer on the thermal convection of viscoelastic fluids in a porousThe results show that the weak interphase heat transfer tends to stabilize the steady convection.

Keywords： thermal convection     porous media     viscoelastic fluid     thermal nonequilibrium model    

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Numerical study on natural convection in a square enclosure containing a rectangular heated cylinder

Jianhua LU, Zhaoli GUO, Zhenhua CHAI, Baochang SHI,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 373-380 doi: 10.1007/s11708-009-0078-x

Abstract: In this paper, the natural convection in a square enclosure with a rectangular heated cylinder is investigated

Keywords： natural convection     buoyant regime     heated cylinder     lattice Boltzmann    

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Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Frontiers of Structural and Civil Engineering   Pages 981-993 doi: 10.1007/s11709-023-0979-5

Abstract: load on the modal coordinates of a linear elastic simple Euler–Bernoulli beam, and investigated the forcedThe forced modal responses consist of multiple frequency-multiplication steady-state harmonics and oneThe analysis revealed that a moving load induces high-harmonic forced resonance amplification when theTo verify the occurrence of high-harmonic forced resonance, numerical tests were conducted on single-spanThe forced resonance amplification characteristics of the fundamental mode for beam response estimation

Keywords： forced vibration     linear Euler beam     moving load     harmonic structure     frequency modulation     end restraints    

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Simulation of interfacial Marangoni convection in gas-liquid mass transfer by lattice Boltzmann method

Shuyong CHEN, Xigang YUAN, Bo FU, Kuotsung YU

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 448-454 doi: 10.1007/s11705-011-1142-8

Abstract: Interfacial Marangoni convection has significant effect on gas-liquid and/or liquid-liquid mass transfermodel and self-renewable interface model, are proposed for the simulation of interfacial Marangoni convectionsimulation results show that the concentration contours are well consistent with the typical roll cell convection

Keywords： interfacial Marangoni convection     lattice Boltzmann method     gas-liquid mass transfer    

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Soybean drying characteristics in microwave rotary dryer with forced convection

Ruifang WANG, Zhanyong LI, Yanhua LI, Jingsheng YE

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3,   Pages 289-292 doi: 10.1007/s11705-009-0022-y

Abstract: A new hybrid drying technique by combining microwave and forced convection drying within a rotary drum

Keywords： cracking     microwave     rotary drying     soybean    

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Natural convection heat transfer of water in a horizontal circular gap

SU Guanghui, WU Yingwei, Kenichiro Sugiyama

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 167-173 doi: 10.1007/s11708-007-0021-y

Abstract: An experimental study on the natural convection heat transfer on a horizontal downward facing heatedThe results show that the buoyancy force acts as a resistance force for natural convection heat transferFor the estimation of the natural convection heat transfer under the present conditions, empirical correlations

Keywords： function     diameter     different independent     different characteristic     horizontal downward    

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Experimental study of primary and secondary side coupling natural convection heat transfer characteristics

Zhimin QIU, Daogang LU, Jingpin FU, Li FENG, Yuhao ZHANG

Frontiers in Energy 2021, Volume 15, Issue 4,   Pages 860-871 doi: 10.1007/s11708-021-0744-1

Abstract: For the local PRHR HX heat transfer performance, traditional natural convection correlations for bothMoreover, the revised natural convection heat transfer correlations based on the present experimental

Keywords： heat removal heat exchanger (PRHR HX)     C-shape tube     revised heat transfer correlations     coupled natural convection    

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Simulation of Effect of Forced Ventilated and Smoke Controlled System in Subway Fire Disaster

Cai Bo,Li Huiliang,Liao Guangxuan

Strategic Study of CAE 2005, Volume 7, Issue 8,   Pages 80-83

Abstract: Based on FDS, the distribution of temperature and smoke with or without forced ventilated and smoke controlled

Keywords： subway fire disaster     FDS simulation     forced ventilated smoke controlled system    

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The study of forced vibration for threetower suspension bridge under moving loads

Feng Zhaoxiang,Chen Liang and Miu Changqing

Strategic Study of CAE 2012, Volume 14, Issue 5,   Pages 80-84

Abstract:

Taking Taizhou Bridge for example, dynamic characteristics of the finite element model are analyzed and then the effects of different moving speeds and loads on dynamic response of three-tower twospan suspension bridge are studied. The result demonstrates that vertical bending of natural frequency is approximately 0.08 Hz, which is far below natural frequency loading truck, and will not form resonance condition. The response of force and displacement of three-tower twospan continuous suspension bridge under simply moving loads and equivalent static loads are the same. The structural will be greater when moving loads quantity and speed become greater and they have similar positive relationship. However, the load amplification factor of structural force and displacement does not vary with the quantity change of moving loads.

Keywords： dynamic characteristics     forced vibration     response     load amplification factor    

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A way to explain the thermal boundary effects on laminar convection through a square duct

Liangbi WANG, Xiaoping GAI, Kun HUANG, Yongheng ZHANG, Xiang YANG, Xiang WU

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 496-506 doi: 10.1007/s11708-010-0020-2

Abstract: For a laminar convection through a square duct, it explains that on the wall surface, the velocity iszero, but convection occurs for uniform wall heat flux (UWHF) boundary in the developing region dueprocess occurs on the wall surface because both velocity and velocity gradient do not contribute to convectionTherefore, a stronger convection process occurs for UWHF than for UWT on the wall surface.The thermal boundary effects on the laminar convection inside the flow are also detailed.

Keywords： convective transport     heat transfer     mass transfer     laminar flow     thermal boundary effects    

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Title Author Date Type Operation

Study on forced air convection cooling for electronic assemblies

LI Bin, TAO Wenquan, HE Yaling

Journal Article

Thermally developing forced convection and the corresponding thermal stresses in a porous plate channel

YANG Xiao, LIU Xuemei

Journal Article

An invariant descriptor for conjugate forced convection-conduction cooling of 3D protruding heaters in

Thiago ANTONINI ALVES,Paulo H. D. SANTOS,Murilo A. BARBUR

Journal Article

Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater

Foued CHABANE,Nesrine HATRAF,Noureddine MOUMMI

Journal Article

MHD effect on the critical temperature differences of oscillatory thermocapillary convection in two-layer

Hulin HUANG, Xiaoming ZHOU,

Journal Article

An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal

Qi WEI, Xiaohui ZHANG

Journal Article

Numerical study on natural convection in a square enclosure containing a rectangular heated cylinder

Jianhua LU, Zhaoli GUO, Zhenhua CHAI, Baochang SHI,

Journal Article

Multi-harmonic forced vibration and resonance of simple beams to moving vehicles

Journal Article

Simulation of interfacial Marangoni convection in gas-liquid mass transfer by lattice Boltzmann method

Shuyong CHEN, Xigang YUAN, Bo FU, Kuotsung YU

Journal Article

Soybean drying characteristics in microwave rotary dryer with forced convection

Ruifang WANG, Zhanyong LI, Yanhua LI, Jingsheng YE

Journal Article

Natural convection heat transfer of water in a horizontal circular gap

SU Guanghui, WU Yingwei, Kenichiro Sugiyama

Journal Article

Experimental study of primary and secondary side coupling natural convection heat transfer characteristics

Zhimin QIU, Daogang LU, Jingpin FU, Li FENG, Yuhao ZHANG

Journal Article

Simulation of Effect of Forced Ventilated and Smoke Controlled System in Subway Fire Disaster

Cai Bo,Li Huiliang,Liao Guangxuan

Journal Article

The study of forced vibration for threetower suspension bridge under moving loads

Feng Zhaoxiang,Chen Liang and Miu Changqing

Journal Article

A way to explain the thermal boundary effects on laminar convection through a square duct

Liangbi WANG, Xiaoping GAI, Kun HUANG, Yongheng ZHANG, Xiang YANG, Xiang WU

Journal Article