Research on Indoor Temperature Distribution Based on Jacobi Iterative Algorithm—Heat Dissipation of Point Heat Source in Closed Space

2020 ◽  
Vol 09 (09) ◽  
pp. 1612-1629
Author(s):  
祥灿 孔
Keyword(s):  
Temperature Distribution ◽  
Heat Source ◽  
Iterative Algorithm ◽  
Heat Dissipation ◽  
Closed Space ◽  
Point Heat Source ◽  
Indoor Temperature

Study on the Pendulum Characteristic of Nature Convection in Dimensional Enclosure

2012 ◽  
Vol 542-543 ◽  
pp. 1120-1123
Author(s):  
Chuan Zhi Mei ◽  
Lin Hua Piao ◽  
Quan Gang Yu ◽  
Bao Li Zhang ◽  
Xia Ding ◽  
...  
Keyword(s):  
Temperature Field ◽  
Temperature Distribution ◽  
Heat Source ◽  
Tilt Angle ◽  
Model Building ◽  
Two Dimensional ◽  
Point Heat Source ◽  
Equation Solving ◽  
Tilt Sensor ◽  
Characteristic 2

In this paper, the pendulum characteristic of nature convection gas in dimensional enclosure is analyzed by FEM. Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving. The results are as follow: (1)Under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characteristic. (2)When the dimensional enclosure is inclined, temperature distribution at the several points in dimensional enclosure will change with the tilt angle. The pendulum characteristic can be utilized to measure the tilt angle by the gas pendulum tilt sensor.

Temperature Distribution During Plate Bending by Torch Flame Heating

1985 ◽  
Vol 29 (01) ◽  
pp. 1-11
Author(s):  
A. Moshaiov ◽  
R. Latorre
Keyword(s):  
Temperature Distribution ◽  
Heat Source ◽  
Transient Analysis ◽  
Transient Behavior ◽  
Point Heat Source ◽  
Plate Edge ◽  
Finite Element Program ◽  
Steady State Temperature ◽  
Element Program ◽  
Analysis Mode

The flame bending of metal hull plates involves a complex thermoplastic process. In order to investigate the thermoplastic behavior it is first necessary to determine the time-varying temperature field in the plate. In this paper the temperature distribution during flame bending of a plate is studied using a distributed heat source moving along the plate surface at a constant speed. The temperature distribution is determined by the numerical solution of the partial differential equation describing the heat conduction in the plate as the distributed heat source passes. The equation is solved using the finite-element program ADINAT in the transient analysis mode. A number of results are presented to illustrate the transient behavior of the temperature near the plate edge as well as the quasi-steady-state temperature distribution. The results are shown to be in qualitative agreement with published experimental data. Additional studies are presented to clarify the influence on the temperature distribution from different material parameters, torch parameters and plate thicknesses. The point heat source expression was modified following Iwasaki's approach [4]. The temperature distribution calculated from this modified expression is shown to be in agreement with the numerical results.

Steady free convection above a point heat source and a horizontal line heat source in a vertical magnetic field

1969 ◽  
Vol 39 (4) ◽  
pp. 753-780 ◽  
Author(s):  
A. M. Soward
Keyword(s):  
Magnetic Field ◽  
Temperature Distribution ◽  
Heat Source ◽  
Thermal Convection ◽  
Dimensionless Number ◽  
Horizontal Line ◽  
Vertical Magnetic Field ◽  
Point Heat Source ◽  
Line Heat Source ◽  
Buoyancy Forces

An electrically conducting fluid is contained above a horizontal plane. A uniform vertical magnetic field is applied externally and the plane is maintained at a uniform temperature except for a point or a line heat source. Density variations are ignored except where they give rise to buoyancy forces.(i) The point heat source. Non-linear effects are small sufficiently far from the source. The resulting buoyancy forces interact with the magnetic forces to maintain a radial inflow towards the heat source. This fluid then escapes vertically as a jet, its structure now depending on the additional influence of viscosity. The perturbations of the temperature distribution and the magnetic field due to the motion are obtained. Finally, the effects of these perturbations back on to the fluid velocity are considered. The most striking features of the perturbations are (a) the action of the jet as a line source of heat for the fluid in the outer regions, (b) the large (compared to other perturbations) eddy in the jet.(ii) The line heat source. The temperature distribution and magnetic field are weakly perturbed only if the thermal and electrical conductivities are sufficiently small. Similar results are obtained, as in (i) above, provided ε (a dimensionless number characterising the strength of thermal convection: see (1.32), (3.24)) is less than ¼. However, even for small ε, the effects of thermal convection cannot be ignored. Hence, superimposed on the jet is an eddy (driven by buoyancy forces) whose flux of fluid increases indefinitely with its height above the plane. When ε > ¼, the results suggest that numerous eddies will be formed.

scholarly journals Temperature distribution of an infinite slab under point heat source

2014 ◽  
Vol 18 (5) ◽  
pp. 1597-1601 ◽  
Author(s):  
Zhao-Chun Wu ◽  
Dao-Lai Cheng
Keyword(s):  
Temperature Field ◽  
Thermal Properties ◽  
Temperature Distribution ◽  
Heat Source ◽  
Manufacturing Processes ◽  
Point Heat Source ◽  
Treatment Processes ◽  
Measuring Devices ◽  
Infinite Slab ◽  
Continuous Point

The temperature field in an infinite slab under an instantaneous or continuous point heat source is studied numerically. The numerical results reveal the temperature distribution and its change regularity, which are significant for the temperature control encountered in many practical manufacturing processes, such as the laser treatment processes on the surface of films, welding and cutting, and even the design of measuring devices for thermal properties of material.

Thermal Shock on a Finite Disk Due to an Instantaneous Point Heat Source

1969 ◽  
Vol 36 (1) ◽  
pp. 113-120 ◽  
Author(s):  
T. R. Hsu
Keyword(s):  
Exact Solution ◽  
Temperature Distribution ◽  
Heat Source ◽  
Thermal Stresses ◽  
Circular Disk ◽  
Transient Temperature ◽  
Nuclear Technology ◽  
Point Heat Source ◽  
Transient Temperature Distribution ◽  
Instantaneous Point

This paper contains an exact solution for the transient temperature distribution and the associated quasi-static thermal stresses and deformations which arise in a finite circular disk subjected to an instantaneous point heat source acting on its periphery. The solutions given are in the form of double infinite series, and extensive illustrative numerical results are included. The solutions are pertinent to problems which occur in welding engineering and in modern nuclear technology.

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