Numerical simulation of the heat transfer process in a layer of moist forest combustible material with radiant heating of its surface by sources of different heights

2019 ◽  
Author(s):  
Alexander Kondakov
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Radiant Heating ◽  
Combustible Material ◽  
Moist Forest ◽  
Forest Combustible Material ◽  
Forest Combustible

Numerical Simulation for Microconvection Around Nano-Particle With Brownian Motion in Liquid

2003 ◽  
Author(s):  
B. X. Wang ◽  
H. Li ◽  
X. F. Peng ◽  
L. X. Yang
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Brownian Motion ◽  
Numerical Model ◽  
Temperature Gradient ◽  
Transfer Process ◽  
Heat Transfer Process ◽  
Nano Particles ◽  
Analytic Method ◽  
Nano Particle

The development of a numerical model for analyzing the effect of the nano-particles’ Brownian motion on the heat transfer is described. By using the Maxwell velocity distribution relations to calculate the most possible velocity of fluid molecules at certain temperature gradient location around the nano-particle, the interaction between fluid molecules and one single nano-particle is analyzed and calculated. Based on this, a syntonic system is proposed and the coupled effect that Brownian motion of nano-particles has on fluid molecules is simulated. This is used to formulate a reasonable analytic method, facilitating laboratory study. The results provide the essential features of the heat transfer process, contributed by micro-convection to be considered.

scholarly journals Thermal conditions for stopping pyrolysis of forest combustible material and applications to firefighting

2017 ◽  
Vol 21 (6 Part A) ◽  
pp. 2565-2577 ◽  
Author(s):  
Alena Zhdanova ◽  
Geniy Kuznetsov ◽  
Jean Legros ◽  
Pavel Strizhak
Keyword(s):  
Heat Transfer ◽  
Characteristic Time ◽  
Thermal Conditions ◽  
Parametric Approach ◽  
Tree Leaves ◽  
Combustible Material ◽  
Material Surfaces ◽  
Forest Combustible Material ◽  
Forest Combustible ◽  
Effective Conditions

Five models describing heat transfer during evaporation of the water sprayed over the forest to stop fires and to cool down the pyrolysis of the bio- top layer are established and investigated by a parametric approach. It aims to improve the understanding of the behaviour and the properties of the forest combustible material. A mathematical description of forest combustible material surfaces (needles of pine and fir-tree, leaves of birch) is established. The characteristic time, td, to cool down the forest combustible material layer below the temperature of the onset of the pyrolysis is the important parameter investigated in the present work. The effective conditions were determined allowing to reach the shortest td and the lowest consumption of e. g. water to be dropped.

scholarly journals HEAT EXCHANGE IN A PLANE CHANNEL IN A TURBULENT FLOW REGIME IN THE CASE OF SMALL VALUES OF PRANDTL NUMBER ACCORDING TO DATA OF DIRECT NUMERICAL SIMULATION

2021 ◽  
Vol 56 ◽  
pp. 57-60
Author(s):  
Yurii G. Chesnokov ◽  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Prandtl Number ◽  
Direct Numerical Simulation ◽  
Transfer Process ◽  
Peclet Number ◽  
Plane Channel ◽  
Heat Transfer Process ◽  
Flat Channel ◽  
Péclet Number

Using the results obtained by the method of direct numerical simulation of the heat transfer process in a flat channel by various authors, it is shown that at small values of Prandtl number quite a few characteristics of the heat transfer process in a flat channel depend not on Reynolds and Prandtl numbers separately, but on Peclet number. Peclet number is calculated from the so-called dynamic speed

scholarly journals Numerical simulation of heat transfer process through insulated and non-insulated floor

2018 ◽  
Vol 15 (2) ◽  
pp. 155-160
Author(s):  
V. K. Averyanov ◽  
◽  
V. M. Ulyasheva ◽  
G. A. Ryabev ◽  
◽  
...  
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Transfer Process ◽  
Heat Transfer Process
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