Gap conductance in contact heat transfer

Wahid, Syed M. S.; Madhusudana, C. V.

doi:10.1016/s0017-9310(00)00071-5

Cited by 44 publications

(15 citation statements)

References 6 publications

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“…The thermal radiation between the SiC sample and the steel plate was calculated with Equation (5) using the surface temperature of the steel sheet for T 0 . The conduction of the air gap was modeled according to Wahid et al [21] as an air gap of 2.7 times the root mean square roughness Rq of the steel sheet with 6.2 µm.…”

Section: Simulationmentioning

confidence: 99%

Temperature and Stress Simulation of 4H-SiC during Laser-Induced Silicidation for Ohmic Contact Generation

Adelmann

Hellmann

2017

Metals

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Abstract:We report here on the simulation of temperature and stress evolution of 4H-SiC during laser-induced silicidation to locally generate ohmic contacts between the semiconductor and nickel metallization. The simulation is based on optical free carrier absorption, thermal conduction, and thermal radiation. Our results show that, during laser irradiation, similar temperatures and correspondingly similar contact resistances, as compared to conventional oven-driven annealing processes, are achievable, yet with the advantageous potential to limit the temperature treatment spatially to the desired regions for electrical contacts and without the necessity of heating complete wafers. However, due to temperature gradients during local laser silicidation, thermal induced stress appears, which may damage the SiC wafer. Based on the simulated results for temperature and stress increase, we identify an optimized regime for laser-induced local silicidation and compare it to experimental data and observations.

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Section: Simulationmentioning

confidence: 99%

Temperature and Stress Simulation of 4H-SiC during Laser-Induced Silicidation for Ohmic Contact Generation

Adelmann

Hellmann

2017

Metals

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“…Thermal contact conductance is defined as the ratio of heat flux across the joint to the additional temperature drop as a result of the imperfect contact at the interface [15]. It is affected by many factors such as contact pressure, interstitial materials, surface roughness and flatness.…”

Section: An Adaptive Convective Boundary Condition Algorithmmentioning

confidence: 99%

Simplified Thermo-Mechanical Modeling of Friction Stir Welding with a Sequential FE Method

Li¹,

Liu²

2014

IJMO

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Abstract-This paper presents a methodology for modeling the transient thermal and mechanical responses without computing the heat generated by friction or plastic deformation. The externally applied heat source accounts for the heat generated from tool movement. The novel heat source model includes two parts: surface heat flux at the shoulder-workpiece interface and nodal heat generation in the material that should have been displaced by the tool. The heat source algorithm is described through equations and flow charts. This thermal model was shown to predict a temperature history in good agreement with experimentally measured results. The mechanical interaction between the contacting surfaces was modelled with contact elements. However the analysis failed to converge with the contact pairs active. For the analysis without contact pairs, the predicted longitudinal direction stresses matched well with experiment but the transverse direction stresses were significantly different.Index Terms-Finite element analysis, friction stir welding, thermo-mechanical modeling, sequential method.

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“…Heat conduction through the gas mixture filling the pellet-cladding gap is the dominant mechanism of transfer. The gas conductivity is given by functions like [11,19]:…”

Section: Thermal Conductance Of the Gas Phasementioning

confidence: 99%

Simulation with DIONISIO 1.0 of thermal and mechanical pellet-cladding interaction in nuclear fuel rods

Soba

Denis

2008

Journal of Nuclear Materials

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Gap conductance in contact heat transfer

Cited by 44 publications

References 6 publications

Temperature and Stress Simulation of 4H-SiC during Laser-Induced Silicidation for Ohmic Contact Generation

Temperature and Stress Simulation of 4H-SiC during Laser-Induced Silicidation for Ohmic Contact Generation

Simplified Thermo-Mechanical Modeling of Friction Stir Welding with a Sequential FE Method

Simulation with DIONISIO 1.0 of thermal and mechanical pellet-cladding interaction in nuclear fuel rods

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