Isotherm penetration depth under a moving Gaussian surface heat source on a thick substrate

<p>Based on multi-level AWS data during 2001 to 2015 and eddy covariance data during 2011 to 2014 at Nagqu Station of Plateau Climate and Environment, the turbulent fluxes were calculated by a surface energy balance combination (CM) and eddy covariance ( EC) method. A long-term heat fluxes and surface heat source were obtained with comparison and correction of EC and CM fluxes. The surface energy closure ratio is close to 1 in spring, summer and autumn. But it reaches to 1.34 in winter due to low net radiation observation value on snow surface. The sensible heat flux shows a ascend trend while latent heat flux shows a descend trend during 2002 to 2015. The surface heat source shows a descend trend. The analysis of the surface heat source indicates that it has a significant relationship with net radiation flux, surface temperature, soil moisture and wind speed. Particularly, the surface heat source has a significant response to net radiation flux throughout the year. There are obvious influences of surface temperature and soil moisture on the surface heat source in spring, autumn and winter. And the influence of wind speeds on surface heat source is strong only in spring. The annual variation of sensible heat flux and latent heat flux are obvious. Sensible heat flux reaches the maximum value of the year in April and the minimum value in July. however, latent heat flux shows the maximum value in July and the minimum value in January.&#160;</p>

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Evaluation of the concentration of a surface heat source with normal distribution of thermal power

Welding International ◽

10.1533/wint.2003.3080 ◽

2003 ◽

Vol 17 (1) ◽

pp. 53-56 ◽

Cited By ~ 2

Author(s):

Yu B Belousov

Keyword(s):

Heat Source ◽

Normal Distribution ◽

Thermal Power ◽

Surface Heat

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Turbulent circulation above the surface heat source in stably stratified atmosphere

10.1063/1.4963976 ◽

2016 ◽

Author(s):

A. F. Kurbatskii ◽

L. I. Kurbatskaya

Keyword(s):

Heat Source ◽

Surface Heat

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Localized heat flow and Tertiary mineralization in southern New Mexico

Geophysics ◽

10.1190/1.1441544 ◽

1983 ◽

Vol 48 (9) ◽

pp. 1212-1218

Author(s):

Gary W. Zielinski ◽

Gail Moritz DeCoursey

Keyword(s):

New Mexico ◽

Heat Flow ◽

Heat Source ◽

Heat Production ◽

Convective Instability ◽

Local Scale ◽

Surface Heat ◽

The Body ◽

Hydrothermal Mineralization ◽

Granitic Intrusion

Eight shallow (<100 m deep) relative heat flow determinations from southern New Mexico reveal a systematic 3 HFU [Formula: see text] increase occurring within a distance of 2 km. The maximum surface heat flow appears roughly to overlie a Tertiary granitic body at a depth of about 600 m within an area of known hydrothermal mineralization. The presence of the anomaly, believed to be of subsurface origin, implies an active heat source centered at a depth of 1140 m, perhaps associated with hydrothermal circulation. Higher radioactive heat production in granites may contribute to convective instability and explain the apparent lateral coincidence between the anomaly and the body. This situation appears, on a local scale, analogous to coinciding zones of high present‐day heat flow and mineralization in England and Wales (Brown et al, 1980). In both cases, mineralization is associated with granitic intrusion that has occurred at a previous time which is much greater than the thermal time constant for cooling bodies. Shallow heat flow determinations may be useful in locating other similar areas and investigating possible associations of mineralization and thermal history.

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Analytical solution to laser short-pulse heating of microsized metal wire: volumetric and surface heat source considerations

Canadian Journal of Physics ◽

10.1139/p2012-087 ◽

2012 ◽

Vol 90 (9) ◽

pp. 911-918 ◽

Cited By ~ 3

Author(s):

B.S. Yilbas ◽

A.Y. Al-Dweik

Keyword(s):

Analytical Solution ◽

Heat Source ◽

Pulse Heating ◽

Short Pulse ◽

Thermal Contact ◽

Lower Surface ◽

Surface Heat ◽

Metal Wire ◽

Fourier Cosine ◽

Volumetric Heat Source

Analytical solution for laser short-pulse heating of a micro-sized metal wire is presented. In the analysis, volumetric and surface heat sources are incorporated for the same pulse intensity. The volumetric heat source resembles absorption by irradiated field according to Lambert’s Beer law while a surface heat source represents short pulse heating through high intensity thermal contact at the surface. The method of Lie point symmetries is combined with a Fourier cosine transformation to solve the temperature equation with appropriate boundary conditions. It is found that temperature profiles differ significantly for volumetric heat source and surface heat source considerations; in which case, volumetric heat source consideration results in considerably lower surface temperatures than that of the surface heat source consideration.

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