Finite Element Analysis as a Tool for Calculating the Thermal Contact Conductance for a Machined Surface

2012 ◽  
Author(s):  
Vijay Gopal ◽  
Mark J. Whiting ◽  
John W. Chew ◽  
Stephen Mills
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Contact ◽  
Thermal Contact Conductance ◽  
Machined Surface ◽  
Element Analysis ◽  
Contact Conductance

scholarly journals Thermal Contact Conductance-Based Thermal Behavior Analytical Model for a Hybrid Floor at Elevated Temperatures

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4257 ◽  
Author(s):  
Min Jae Park ◽  
Jeong Ki Min ◽  
Jaehoon Bae ◽  
Young K. Ju
Keyword(s):  
Thermal Behavior ◽  
Elevated Temperatures ◽  
Heated Surface ◽  
Thermal Contact ◽  
Polymeric Materials ◽  
Steel Plates ◽  
Thermal Contact Conductance ◽  
Small Scale ◽  
Element Analysis ◽  
Contact Conductance

Hybrid floors infilled with polymeric materials between two steel plates were developed as a prefabricated floor system in the construction industry. However, the floor’s fire resistance performance has not been investigated. To evaluate this, fire tests suggested by the Korean Standards should be performed. As these tests are costly and time consuming, the number of variables were limited. However, many variables can be investigated in other ways such as furnace tests and finite element analysis (FEA) with less cost and time. In this study, furnace tests on heated surface areas smaller than 1 m2 were conducted to investigate the thermal behavior of the hybrid floor at elevated temperatures. To obtain the reliability of the proposed thermal behavior analytical (TBA) model, verifications were conducted by FEAs. Thermal contact conductance including interfacial thermal properties between two materials was adopted in the TBA model, and the values at elevated temperatures were suggested based on thermo-gravimetric analyses results and verified by FEA. Errors between the tests and TBA model indicated that the model was adequate in predicting the temperature distribution in small-scale hybrids. Furthermore, larger furnace tests and analysis results were compared to verify the TBA model’s application to different sized hybrid floors.

A Finite Element Model of Self-Resonating Bimorph Microcantilever for Fast Temperature Cycling in A Pyroelectric Energy Harvester.

2011 ◽  
Vol 1325 ◽  
Author(s):  
Salwa Mostafa ◽  
Nicolay Lavrik ◽  
Thirumalesh Bannuru ◽  
Slo Rajic ◽  
Syed K. Islam ◽  
...  
Keyword(s):  
Finite Element ◽  
Heat Source ◽  
Energy Harvester ◽  
Thermal Contact ◽  
Temperature Cycling ◽  
Thermal Contact Conductance ◽  
Contact Conductance ◽  
Source Temperature ◽  
Heat Source Temperature ◽  
Cantilever Structure

ABSTRACTA self resonating bimorph cantilever structure for fast temperature cycling in a pyroelectric energy harvester has been modeled using finite element method. Effect of constituting material properties and system parameters on the frequency and magnitude of temperature cycling and the efficiency of energy recycling using the proposed structure has been investigated. Results show that thermal contact conductance and heat source temperature play a key role in dominating the cycling frequency and efficiency of energy recycling. Studying the performance trend with various parameters such as thermal contact conductance, heat source temperature, device aspect ratio and constituent material of varying thermal conductivity and expansion coefficient, an optimal solution for most efficient energy scavenging process has been sought.

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