scholarly journals Thermal Wave Scattering by an Elliptic Subsurface Hole Buried in a Block, Based on the Non-Fourier Equation

Sensors ◽  
2019 ◽  
Vol 19 (8) ◽  
pp. 1878 ◽  
Author(s):  
Zhou ◽  
Wang
Keyword(s):  
Thermal Wave ◽  
Wave Scattering ◽  
Complex Function ◽  
Mapping Method ◽  
Wave Number ◽  
Engineering Practice ◽  
Physical Parameters ◽  
Temperature Distributions ◽  
Wave Imaging ◽  
Block Based

With the application to engineering practice, the study of the scattering of thermal waves using innovative and comprehensive methods is becoming increasingly important. The thermal wave scattering by an elliptic subsurface hole in a block with two boundaries is discussed based on the non-Fourier heat conduction equation, employing the complex function method and the conformal mapping method, and a general solution for the thermal wave scattering is given. The numerical results of temperature distributions around a subsurface hole are presented and the effects of geometrical and physical parameters on the temperature distributions were analyzed. The wave number, the shape and position of the hole, the scale of the block, and the frequency of the heat load were found to have great effects on distributions and variations of temperature. The findings of this study could be helpful in providing better understandings of infrared thermal wave imaging, the physical inverse problem, and the evaluation of internal holes in materials.

scholarly journals Thermal Wave Scattering and Temperature Concentration around the Opening in Platinum–Rhodium Leaky Plates

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 946
Author(s):  
Weibo Jiang ◽  
Chuanping Zhou ◽  
Zhixian Yang ◽  
Zhi Sun ◽  
Huawei Ji ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Thermal Wave ◽  
Wave Scattering ◽  
Scattering Problem ◽  
Complex Function ◽  
Wave Model ◽  
Mapping Method ◽  
Physical Parameters ◽  
Design And Optimization ◽  
Conformal Mapping Method

Based on the non-Fourier heat conduction wave model, the thermal wave scattering near the opening in the platinum–rhodium glass fiber leaky plate structure is studied by using complex function method and conformal mapping method, and the general solution of the thermal wave scattering problem is given. The boundary condition of the open surface is adiabatic. The influence of the geometrical and physical parameters of the leaky plate on the temperature distribution in the plate is analyzed, and the numerical results of the temperature concentration are given. This study can provide theoretical basis and reference data for the design and optimization of the opening structure of platinum–rhodium glass fiber leaky plate.

Thermal-wave experiments on moving samples

1986 ◽  
Vol 64 (9) ◽  
pp. 1281-1283
Author(s):  
G. Busse
Keyword(s):  
Wave Propagation ◽  
Wave Velocity ◽  
Remote Monitoring ◽  
Thermal Wave ◽  
Time Of Flight ◽  
Temperature Distributions ◽  
Wave Imaging ◽  
Spatial Temperature ◽  
Thermal Wave Imaging

Thermal-wave propagation has been observed on moving samples. Motion of a solid causes a shift of the transmitted thermal wave from which (similar to time-of-flight arrangements) the wave velocity can be determined. Rotation of the sample gives rise to synchronization effects on spatial temperature distributions. Motion of subsurface liquid affects thermal-wave propagation along the surface. Applications of the results are in the field of thermal-wave imaging and remote monitoring of motion and flow.

THERMAL WAVE IMAGING OF CRACKS IN METALS

1983 ◽  
Vol 44 (C6) ◽  
pp. C6-519-C6-524
Author(s):  
K. R. Grice ◽  
L. J. Inglehart ◽  
L. D. Favro ◽  
P. K. Kuo ◽  
R. L. Thomas
Keyword(s):  
Thermal Wave ◽  
Wave Imaging ◽  
Thermal Wave Imaging

A low-cost laboratory thermal wave imaging system

1984 ◽  
Vol 17 (6) ◽  
pp. 526-532 ◽  
Author(s):  
G F Kirkbright ◽  
R M Miller ◽  
A Rzadkiewicz
Keyword(s):  
Thermal Wave ◽  
Imaging System ◽  
Low Cost ◽  
Wave Imaging ◽  
Thermal Wave Imaging

Mechanisms of Synchronous Belt Tooth Failure due to Fatigue Shear Fracture

2011 ◽  
Vol 86 ◽  
pp. 566-569
Author(s):  
Jian Hua Guo ◽  
Hong Yuan Jiang ◽  
Dong Sheng Li
Keyword(s):  
Conformal Mapping ◽  
Compressive Stress ◽  
Shear Fracture ◽  
Complex Function ◽  
Fatigue Cracking ◽  
Plane Elasticity ◽  
Mapping Method ◽  
Tooth Surface ◽  
Tooth Root ◽  
Shear Cracking

Conformal mapping with complex function based on plane elasticity mechanics is an analytical method for resolving stress and displacement at any point of a half-plane domain. Using complex function conformal mapping method in this article we investigated the relationship between load on tooth surface and maximum stress at tooth root for calculating the maximum compressive stress on the opposite side of working flank and maximum tensile stress on working flank side when loads are applied to tooth top and root of working flank side, respectively. The maximum tensile and compressive stress at the tooth root are the main forces that cause fatigue cracking of the tooth root, which may extend along the elastomer compound-cord interface resulting in shear cracking of the belt tooth. The results of our calculation reveal the mechanisms whereby tooth shear cracking causes fatigue failure of synchronic belt, which are consistent with the experimental research results of Lizuka.

NON-DESTRUCTIVE EVALUATION OF CONCRETE STRUCTURES BY NON-STATIONARY THERMAL WAVE IMAGING

2012 ◽  
Vol 32 ◽  
pp. 39-48 ◽  
Author(s):  
Ravibabu Mulaveesala ◽  
Soma Sekhara Balaji Panda ◽  
Rupla Naik Mude ◽  
Muniyappa Amarnath
Keyword(s):  
Thermal Wave ◽  
Concrete Structures ◽  
Non Destructive Evaluation ◽  
Wave Imaging ◽  
Non Destructive ◽  
Thermal Wave Imaging

scholarly journals ON THE LINEAR SHIFT INVARIANCE OF THE THERMAL WAVE IMAGING

1997 ◽  
Vol 46 (7) ◽  
pp. 1338
Author(s):  
ZENG SHAO-QUN ◽  
XU HAI-FENG ◽  
LI JIAO-YANG ◽  
LIU XIAO-DE
Keyword(s):  
Thermal Wave ◽  
Wave Imaging ◽  
Shift Invariance ◽  
Thermal Wave Imaging
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