Verification of boundary conditions for thermal analysis of the power module with various methods

2011 ◽  
Author(s):  
J. Popovic ◽  
D. Dolinar ◽  
M. Milanovic
Keyword(s):  
Thermal Analysis ◽  
Boundary Conditions ◽  
Power Module

Long-term thermal two- and three-dimensional analysis of roller compacted concrete dams supported by monitoring verification

2010 ◽  
Vol 37 (4) ◽  
pp. 600-610 ◽  
Author(s):  
Vladan Kuzmanovic ◽  
Ljubodrag Savic ◽  
John Stefanakos
Keyword(s):  
Thermal Analysis ◽  
Boundary Conditions ◽  
Thermal Field ◽  
Numerical Models ◽  
Three Dimensional ◽  
Roller Compacted Concrete ◽  
Rcc Dam ◽  
Field Investigations ◽  
Good Agreement

This paper presents two-dimensional (2D) and three-dimensional (3D) numerical models for unsteady phased thermal analysis of RCC dams. The time evolution of a thermal field has been modeled using the actual dam shape, RCC technology and the adequate description of material properties. Model calibration and verification has been done based on the field investigations of the Platanovryssi dam, the highest RCC dam in Europe. The results of a long-term thermal analysis, with actual initial and boundary conditions, have shown a good agreement with the observed temperatures. The influence of relevant parameters on the thermal field of RCC dams has been analyzed. It is concluded that the 2D model is appropriate for the thermal phased analysis, and that the boundary conditions and the mixture properties are the most influential on the RCC dam thermal behavior.

Identification of thermo-mechanical fatigue fracture location by transient thermal analysis for high-temperature operating SiC power module assembled with ZnAl eutectic solder

2018 ◽  
Vol 2018 (HiTEC) ◽  
pp. 000028-000031 ◽  
Author(s):  
Fumiki Kato ◽  
Hiroki Takahashi ◽  
Hidekazu Tanisawa ◽  
Kenichi Koui ◽  
Shinji Sato ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Thermal Resistance ◽  
Thermal Cycle ◽  
Base Plate ◽  
Test Machine ◽  
Power Module ◽  
Eutectic Solder ◽  
Transient Thermal Analysis ◽  
The Individual ◽  
Transient Thermal

Abstract In this paper, we demonstrate that the structural degradation of a silicon carbide (SiC) power module corresponding to thermal cycles can be detected and tracked non-destructively by transient thermal analysis method. The purpose of this evaluation is to analyze the distribution of the thermal resistance in the power module and to identify the structure deterioration part. The power module with SiC-MOSFET were assembled using ZnAl eutectic solder as device under test. The individual thermal resistance of each part such as the SiC-die, the die-attachment, the AMCs, and the baseplate was successfully evaluated by analyzing the structure function graph. A series of thermal cycle test between −40 and 250°C was conducted, and the power modules were evaluated their thermal resistance taken out from thermal cycle test machine at 100, 200, 500 and 1000 cycles. We confirmed the increase in thermal resistance between AMCs and base plate in each thermal cycle. The portion where the thermal resistance increased is in good agreement with the location of the structural defect observed by scanning acoustic tomography (SAT) observation.

Comparision of Thermal Analysis in Mobile Phone Using Ansys

2014 ◽  
Vol 592-594 ◽  
pp. 1875-1880
Author(s):  
B. Jayachandraiah
Keyword(s):  
Heat Transfer ◽  
Thermal Analysis ◽  
Boundary Conditions ◽  
Mobile Phone ◽  
Cell Phone ◽  
Ansys Software ◽  
High Demand ◽  
3 Dimensional ◽  
A Cell ◽  
Optimum Heat

“Necessity is the Mother of Invention”-one of the most Important and Interesting Man Made Inventions is Mobile Phone. there is a Rapid Increase in the Number of Users of Mobile Phone in the Last Decade. Today, it's Hard to Find a Cell Phone that Doesn't Offer some Sort of "smart" Technology because it's in such a High Demand. the Use of Mobile Phone has Become an Integral Part of Human Lives. in this Paper, an Attempt is Made to Study the Optimization of 3-Dimensional Heat Transfer Phenomena in Mobile Phone Using ANSYS for Three Different Models and Different Companies such as HTC Desire C, Nokia Lumia 900 and Sony Xperia Tipo. the Actual Dimensions and Materials are Chosen for above Models. the Three Models are Modelled in Pro/E, then Meshed by 3D-10 Nodded Tetrahedral Thermal Solid Elements (SOLID87) and Analysed in ANSYS Software, by Applying Boundary Conditions. the Analysis is Carried-out to Find the Nodal Temperatures, Directional Thermal Fluxes. it is Found that the Optimum Heat Transfer Occurs at HTC Desire C and Validated with the References.

Thermomechanical Design of a Heat Exchanger for a Recuperative Aeroengine

2006 ◽  
Vol 128 (4) ◽  
pp. 736-744 ◽  
Author(s):  
Harald Schoenenborn ◽  
Ernst Ebert ◽  
Burkhard Simon ◽  
Paul Storm
Keyword(s):  
Thermal Analysis ◽  
Heat Exchanger ◽  
Boundary Conditions ◽  
Stress Analysis ◽  
Element Model ◽  
Automatic Generation ◽  
Temperature Fields ◽  
Transient Temperature ◽  
Engine Operation ◽  
Aero Engines

Within the framework programs of the EU for Efficient and Environmentally Friendly Aero-Engines (EEFEA) MTU has developed a highly efficient cross-counter flow heat exchanger for the application in intercooled recuperated aeroengines. This very compact recuperator is based on the profile tube matrix arrangement invented by MTU and one of its outstanding features is the high resistance to thermal gradients. In this paper the combined thermomechanical design of the recuperator is presented. State-of-the-art calculation procedures for heat transfer and stress analysis are combined in order to perform a reliable life prediction of the recuperator. The thermal analysis is based upon a 3D parametric finite element model generation. A program has been generated, which allows the automatic generation of both the material mesh and the boundary conditions. Assumptions concerning the boundary conditions are presented as well as steady state and transient temperature results. The stress analysis is performed with a FEM code using essentially the same computational grid as the thermal analysis. With the static temperature fields the static loading of the profile tubes is determined. From transient thermal calculations successive 3D temperature fields are obtained which enable the determination of creep life and LCF life of the part. Finally, vibration analysis is performed in order to estimate the vibration stress of the profile tubes during engine operation. Together with the static stress a Goodman diagram can be constructed. The combined analysis shows the high life potential of the recuperator, which is important for economic operation of a recuperative aero-engine.

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