Sensing of Heat Source in a Deep Layer by Considering Heat Propagation

The aim of this research is to measure and mapping the temperature distribution in several subsurface layers in the manifestation of geothermal warm ground and steaming ground, and analyze the geothermal subsurface gradient, to determine the heat source zone, and the pattern and direction of heat flow from subsurface to surface in Hydrothermal area of Minahasa Indonesia. The method used is direct measurement in the field. To determine the coordinates of geothermal manifestations and location mapping, using remote sensing techniques. The results showed that at a depth of 200 cm the temperature reaches 102 0C and the heat source comes from the northeast and from the south. At a depth of 150 cm the temperature varies from 52 to 100 0C with an even distribution in almost every direction. At a depth of 50 to 100 cm the maximum temperature reaches 98 0C with heat propagation starting to concentrate then northeast, and then out to the surface in the northeast. The pattern of heat transmission is almost linear along with the geothermal gradient.

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Thermoelastic waves in an infinite solid caused by a line heat source

International Journal of Mathematics and Mathematical Sciences ◽

10.1155/s0161171297000434 ◽

1997 ◽

Vol 20 (2) ◽

pp. 323-334 ◽

Cited By ~ 15

Author(s):

Ranjit S. Dhaliwal ◽

Samir R. Majumdar ◽

Jun Wang

Keyword(s):

Heat Source ◽

Generalized Thermoelasticity ◽

Small Time ◽

Heat Propagation ◽

Temperature Fields ◽

Line Heat Source ◽

Laplace Transform Technique ◽

Thermoelastic Waves ◽

Special Case ◽

Small Time Approximation

The generalized thermoelasticity theory recently developed by Green and Naghdi is employed to investigate thermoelastic interactions caused by a continuous line heat source in a homogeneous isotropic unbounded solid. Hankel-Laplace transform technique is used to solve the problem. Explicit expressions, for stress and temperature fields, are obtained for small time approximation. Numerical values are displayed graphically. Our results show that this theory predicts an infinite speed for heat propagation in general, and includes the second sound phenomena as a special case.

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Geometry optimization of thermal interface material with the help of heat propagation speed subjected to a pulsed heat source

International Journal of Thermal Sciences ◽

10.1016/j.ijthermalsci.2016.08.006 ◽

2017 ◽

Vol 111 ◽

pp. 100-107

Author(s):

Anjan Sarkar ◽

Basil Issac

Keyword(s):

Heat Source ◽

Geometry Optimization ◽

Propagation Speed ◽

Heat Propagation ◽

Thermal Interface Material ◽

Thermal Interface ◽

Heat Propagation Speed

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On the Thermal Shock Wave Induced by a Moving Heat Source

Journal of Heat Transfer ◽

10.1115/1.3250667 ◽

1989 ◽

Vol 111 (2) ◽

pp. 232-238 ◽

Cited By ~ 70

Author(s):

D. Y. Tzou

Keyword(s):

Shock Wave ◽

Temperature Field ◽

Heat Source ◽

Thermal Shock ◽

Thermal Field ◽

Heat Propagation ◽

Moving Heat Source ◽

Finite Speed ◽

Wave Angle ◽

Wave Induced

Analytical solutions for the temperature field around a moving heat source in a solid with finite speed of heat propagation are obtained via the method of Green’s functions. When the speed of the moving heat source is equal to or faster than that of the thermal wave propagated in the solid, the thermal shock wave is shown to exist in the thermal field. The shock wave angle is obtained as sin−1 (1/M) for M ≥1. Orientation of crack initiation in the vicinity of the heat source is also estimated by considering the temperature gradient T,θ along the circumference of a continuum circle centered at the heat source. Such an orientation is established as a function of the thermal Mach number in the subsonic, transonic, and supersonic regimes, respectively.

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