Numerical modeling of the effect of heat and mass transfer in porous low-temperature heat insulation in composite material structures on the magnitude of stresses which develop

1997 ◽  
Vol 33 (3) ◽  
pp. 275-281
Author(s):  
G. V. Kuznetsov ◽  
N. V. Rudzinskaya
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Composite Material ◽  
Low Temperature ◽  
Heat And Mass Transfer ◽  
Heat Insulation ◽  
Temperature Heat

Heat and mass transfer in low-temperature heat exchanger pipes

1972 ◽  
Vol 22 (5) ◽  
pp. 558-561
Author(s):  
L. L. Vasil'ev ◽  
L. P. Grakovich ◽  
S. V. Konev
Keyword(s):  
Mass Transfer ◽  
Heat Exchanger ◽  
Low Temperature ◽  
Heat And Mass Transfer ◽  
Temperature Heat

Thermal convection in melting zone of hollow microparticle Al2O3

2021 ◽  
pp. 20-25
Author(s):  
V.V. Shekhovtsov ◽  
◽  
YU.A. Abzaev ◽  
O.G. Volokitin ◽  
A.A. Klopotov ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Liquid Phase ◽  
Heat And Mass Transfer ◽  
Convective Heat ◽  
Thermal Convection ◽  
Melting Zone ◽  
Melting Front ◽  
Α Al2o3 ◽  
Inner Region

The paper presents the results of numerical modeling of development melting zone hollow spherical microparticle α-Al2O3. The object of the study was part circular sector, which represents the shell of hollow particle, which is formed under action plasma flow. Numerically describe the unsteady convective heat and mass transfer in shell hollow particle, we used the system Navier-Stokes equations in Boussinesq approximation, which describes the weak convection medium. Due to the high coefficient of porosity (P = 0.56) initial agglomerated particle with the α-Al2O3 structure, the inner region at the stage of heating Tp ≥ Tmelt is in the conditions heat exchange with the incoming heat flux, as result of which the temperature center coincided with the temperature particle surface. Result of overheating of the condensed phase, liquid layer of fused grains is formed in the inner and outer regions microparticle. In this case, the melting front is directed towards center shell. Result of numerical modeling, it has been established that convective heat and mass transfer is observed in melting zones (liquid phase), vector field of which covers almost the entire region of the liquid phase. It was found that thermal convection in the external liquid phase is characterized by velocities that are more than 2 times higher than the displacement velocity in the inner region of the particle. It is shown that there is no displacement of the material inside the convection region, thereby inhomogeneous heating occurs in the molten layer of the particle, which significantly affects the speed of movement of the melting front.

NUMERICAL MODELING OF HEAT AND MASS TRANSFER IN STARCH SYSTEMS

1999 ◽  
Vol 42 (2) ◽  
pp. 449-455 ◽  
Author(s):  
J. Irudayaraj ◽  
Y. Wu
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Heat And Mass Transfer

Influence of shrinkage during natural rubber sheet drying: Numerical modeling of heat and mass transfer

2019 ◽  
Vol 149 ◽  
pp. 798-806 ◽  
Author(s):  
Clement Ajani ◽  
Stefano Curcio ◽  
Racha Dejchanchaiwong ◽  
Perapong Tekasakul
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Natural Rubber ◽  
Heat And Mass Transfer ◽  
Rubber Sheet

scholarly journals Analysis of heat and mass transfer mechanism during thermal energy storage and temperature regulation

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3185-3193
Author(s):  
Sina Dang ◽  
Hongjun Xue ◽  
Xiaoyan Zhang ◽  
Chengwen Zhong
Keyword(s):  
Mass Transfer ◽  
Energy Storage ◽  
Low Temperature ◽  
Phase Change ◽  
Heat And Mass Transfer ◽  
Latent Heat ◽  
Temperature Regulation ◽  
Phase Change Materials ◽  
Heat Energy ◽  
Temperature Environment

To strengthen the heat and mass transfer capacity and improve the temperature regulation rate, potential storage is taken as the research object in this research to study the heat energy storage of the battery in the low temperature environment. Lattice Boltzmann method is adopted to study the heat energy storage influence mechanism of the temperature regulation system of the low temperature phase-change materials. In addition, the influence of different physical parameters (thermal conductivity and latent heat of phase change) on the thermal insulation of the system in the process of temperature control is revealed. The results show that the mechanism of heat and mass transfer in the process of heat storage and temperature control is related to the different physical properties of phase change materials. The decrease of thermal conductivity and the increase of latent heat of phase change materials will greatly increase the effect of heat energy storage. Therefore, under the action of phase change latent heat, phase change material can effectively extend the holding time of the battery in the low temperature environment.

Numerical modeling of heat and mass transfer during coffee roasting process

2011 ◽  
Vol 105 (2) ◽  
pp. 264-269 ◽  
Author(s):  
Angelo Fabbri ◽  
Chiara Cevoli ◽  
Laura Alessandrini ◽  
Santina Romani
Keyword(s):  
Mass Transfer ◽  
Numerical Modeling ◽  
Heat And Mass Transfer ◽  
Roasting Process ◽  
Coffee Roasting
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