Vacuum-tube and transistor instruments for investigating thermal conductivity by means of a linear heat source

1966 ◽  
Vol 11 (6) ◽  
pp. 406-409 ◽  
Author(s):  
L. F. Yankelev ◽  
I. M. Bluvshtein
Keyword(s):  
Thermal Conductivity ◽  
Heat Source ◽  
Vacuum Tube ◽  
Linear Heat ◽  
Linear Heat Source

A new method for the determination of thermal conductivity and thermal diffusivity from linear heat source measurements

1997 ◽  
Vol 68 (11) ◽  
pp. 4184-4190 ◽  
Author(s):  
M. Banaszkiewicz ◽  
K. Seiferlin ◽  
T. Spohn ◽  
G. Kargl ◽  
N. Kömle
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Heat Source ◽  
New Method ◽  
Linear Heat ◽  
Linear Heat Source

Development of a Linear Heat Source Probe and Determination of Banana Thermal Conductivity

2010 ◽  
Vol 6 (5) ◽  
Author(s):  
Camila Augusto Perussello ◽  
Viviana Cocco Mariani ◽  
Luciano A Mendes
Keyword(s):  
Thermal Conductivity ◽  
Heat Source ◽  
Effective Thermal Conductivity ◽  
Nutritional Value ◽  
Added Value ◽  
Important Food ◽  
Moisture Contents ◽  
Linear Heat ◽  
Linear Heat Source

The aim of this study was to develop a linear heat source probe in order to measure the effective thermal conductivity of food products. In this study, such heat source probe was applied to measure the effective thermal conductivity of bananas and to evaluate its relation with the moisture contents of the product, in the range of 63-85% (wet basis). The values obtained to thermal conductivity ranged from 0.3 to 0.55 W/m°C and were fitted to empirical equations. The predicted effective thermal conductivity presented satisfactory agreement with literature data and the best adjustment to thermal conductivity was given by the linear equation k = 0.8975U – 0.1568, with R2 of 0.8414. Furthermore, the banana was selected in this study because it is an important food due to its intense worldwide commercialization and high nutritional value and also because it has been increasingly produced in dry form, in a new range of products with higher added value and lower transportation costs.

COMPUTATIONAL FLUID DYNAMICS BASED MODELING OF A LINEAR HEAT SOURCE

2014 ◽  
Vol 13 (8) ◽  
pp. 1957-1964
Author(s):  
Raluca Teodosiu ◽  
Lidia Niculita ◽  
Catalin Teodosiu
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heat Source ◽  
Linear Heat ◽  
Linear Heat Source

scholarly journals Understanding the thermal problem of variable gradient functionally graded plate based on hybrid numerical method under linear heat source

2021 ◽  
Vol 13 (5) ◽  
pp. 168781402110178
Author(s):  
Jianhui Tian ◽  
Guoquan Jing ◽  
Xingben Han ◽  
Guangchu Hu ◽  
Shilin Huo
Keyword(s):  
Heat Conduction ◽  
Temperature Distribution ◽  
Heat Source ◽  
Numerical Method ◽  
Functionally Graded ◽  
Thermal Problem ◽  
Linear Heat ◽  
Hybrid Numerical Method ◽  
Linear Heat Source ◽  
Gradient Parameter

The thermal problem of functionally graded materials (FGM) under linear heat source is studied by a hybrid numerical method. The accuracy of the analytical method and the efficiency of the finite element method are taken into account. The volume fraction of FGM in the thickness direction can be changed by changing the gradient parameters. Based on the weighted residual method, the heat conduction equation under the third boundary condition is established. The temperature distribution of FGM under the action of linear heat source is obtained by Fourier transform. The results show that the closer to the heat source it is, the greater the influence of the heat source is and the influence of the heat source is local. The temperature change trend of the observation points is consistent with the heat source, showing a linear change. The results also show that the higher the value of gradient parameter is, the higher the temperature of location point is. The temperature distribution of observation points is positively correlated with gradient parameter. When the gradient parameter value exceeds a certain value, it has a little effect on the temperature change in the model and the heat conduction in the model tends to be pure metal heat conduction, the optimal gradient parameters combined the thermal insulation property of ceramics and the high strength toughness of metals are obtained.

The influence of infiltration angle on the identification effect of seepage with linear heat source method

Measurement ◽  
2019 ◽  
Vol 148 ◽  
pp. 106974 ◽  
Author(s):  
Jiang Chen ◽  
Feng Xiong ◽  
Junli Zheng ◽  
Qi Ge ◽  
Fei Cheng
Keyword(s):  
Heat Source ◽  
Linear Heat ◽  
Source Method ◽  
Linear Heat Source

scholarly journals СONTACT LOCAL HEATING OF AN ALUMINUM BASE WITH NANOPOROUS ALUMINA BY A LINEAR HEAT SOURCE FOR USE IN THERMOMETRY

Doklady BGUIR ◽  
2019 ◽  
pp. 105-109
Author(s):  
N. V. Lushpa ◽  
N. T. Dinh
Keyword(s):  
Heat Source ◽  
Local Heating ◽  
Thermal Studies ◽  
Sample Surface ◽  
Dielectric Materials ◽  
Contact Method ◽  
Nanoporous Alumina ◽  
Linear Heat ◽  
Linear Heat Source ◽  
Aluminum Base

The paper presents the results of thermal studies for a sample of aluminum with nanoporous alumina using thermal imaging measurements. As a heating element, a carbon thread based on a viscose technical thread was used. On the base of results, it was established that local heating of the sample surface by the contact method using a linear heat source can be used in thermometry to determine the thermal conductivity of solid multicomponent dielectric materials.

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