Determination of surface location between two sub-domains using the temperature distribution on the external surface

AbstractThe present investigation deals with the determination of temperature profile and subsequent rates of cooling at certain points on the external surface along axis of an ERW pipe, during TIG welding. Two samples of different diameters of pipes of ASTM A 106 Gr. B, seamless type are selected for experimentation. The temperatures on the external surface at different locations on each of these seamless pipes (of different diameters) during welding have been measured with the help of digital pyrometers. The temperature variation along the axis of pipe from the weld arc has been presented. Thereafter, through separate analytical methods the temperature distribution across the external surface of the pipe for a given point heat source is theoretically calculated, and the results are compared with the previously found experimental values of temperatures. They are found to be well in agreement. Further, the rates of cooling of a pre-selected point on the pipe surface are experimentally and analytically determined under varying welding conditions and are compared likewise and are found to be in good agreement too.

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Revisiting cosmic microwave background radiation using blackbody radiation inversion

Scientific Reports ◽

10.1038/s41598-020-80195-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Koustav Konar ◽

Kingshuk Bose ◽

R. K. Paul

Keyword(s):

Temperature Distribution ◽

Cosmic Microwave Background ◽

Background Radiation ◽

Big Bang ◽

Blackbody Radiation ◽

Microwave Background ◽

Background Spectrum ◽

Microwave Background Radiation ◽

Mathematical Process

AbstractBlackbody radiation inversion is a mathematical process for the determination of probability distribution of temperature from measured radiated power spectrum. In this paper a simple and stable blackbody radiation inversion is achieved by using an analytical function with three determinable parameters for temperature distribution. This inversion technique is used to invert the blackbody radiation field of the cosmic microwave background, the remnant radiation of the hot big bang, to infer the temperature distribution of the generating medium. The salient features of this distribution are investigated and analysis of this distribution predicts the presence of distortion in the cosmic microwave background spectrum.

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Determination of the Speed of Flames and the Temperature Distribution in a Spherical Bomb from Time‐Pressure Explosion Records

The Journal of Chemical Physics ◽

10.1063/1.1749464 ◽

1934 ◽

Vol 2 (5) ◽

pp. 283-290 ◽

Cited By ~ 77

Author(s):

Bernard Lewis ◽

Guenther von Elbe

Keyword(s):

Temperature Distribution ◽

Time Pressure

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Analytical determination of the soil temperature distribution and freezing front position for linear arrangement of freezing pipes using the undetermined coefficient method

Cold Regions Science and Technology ◽

10.1016/j.coldregions.2021.103253 ◽

2021 ◽

Vol 185 ◽

pp. 103253

Author(s):

Song Zhang ◽

Zurun Yue ◽

Tiecheng Sun ◽

Jiwei Zhang ◽

Baolong Huang

Keyword(s):

Temperature Distribution ◽

Soil Temperature ◽

Analytical Determination ◽

Freezing Front ◽

Linear Arrangement ◽

Front Position ◽

Undetermined Coefficient ◽

Coefficient Method ◽

Undetermined Coefficient Method

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Application of Thermal Sensors for Determination of Mass Flow Rate and Velocity of Flow in Pipes of Hermetic Systems

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.826.117 ◽

2019 ◽

Vol 826 ◽

pp. 117-124

Author(s):

Yurii Baidak ◽

Iryna Vereitina

Keyword(s):

Temperature Distribution ◽

Mass Flow Rate ◽

Cross Section ◽

Correction Factor ◽

Mass Flow ◽

Flow Rate ◽

Thermal Sensors ◽

Pipe Surface ◽

Pipe Cross Section

The paper relates to the field of measuring technologies and deals with the enhancement of thermoconvective method when it is applied for the experimental determination of such hydrodynamics indicators as mass flow rate and velocity of flow by their indirect parameters - capacity of the heater and the temperatures obtained from two thermal sensors, provided that they are located on the hermetic piping system surface. The issue of determination of correction factor on heterogeneity of liquid temperature distribution in the pipe cross section depending on pipe diameter and fluid movement velocity was clarified. According to the results of numerical calculations, the dependencies of temperature gradient on the pipe surface and the correction factor on the heterogeneity of the temperature distribution along the pipe cross-section under the heater in the function of the velocity of flow in pipes of different diameters are plotted. These dependencies specify the thermal method of studying the fluid flow in the pipes, simplify the experiment conduction, are useful in processing of the obtained results and can be applied in measuring engineering.

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