Effects of Cattaneo–Christov heat flux analysis on heat and mass transport of Casson nanoliquid past an accelerating penetrable plate with thermal radiation and Soret–Dufour mechanism

Heat Transfer ◽  
2020 ◽  
Author(s):  
Karnati Veera Reddy ◽  
Gurrampati Venkata Ramana Reddy ◽  
Yaragani Hari Krishna
Keyword(s):  
Heat Flux ◽  
Mass Transport ◽  
Thermal Radiation ◽  
Flux Analysis ◽  
Heat And Mass Transport

Flow and thermal management of MHD Cross nanofluids over a thin needle with auto catalysis chemical reactions

2020 ◽  
Vol 34 (30) ◽  
pp. 2050287
Author(s):  
Yu-Ming Chu ◽  
M. Ijaz Khan ◽  
M. Israr Ur Rehman ◽  
Seifedine Kadry ◽  
M. K. Nayak
Keyword(s):  
Heat Flux ◽  
Mass Transport ◽  
Radiative Heat ◽  
Research Work ◽  
Skin Friction Coefficient ◽  
Heterogeneous Reactions ◽  
Radiative Heat Flux ◽  
Heat And Mass Transport ◽  
Electrically Conducting ◽  
Flow Heat

This research work concerns the investigation of electrically conducting stagnation point flow, heat and mass transport of magneto-Cross nanofluids towards a moving and stretched surface of thin needle. The Buongiorno nanofluid model is incorporated to model the governing expressions. The flow is conducted electrically and generated through stretching impact. Internal diffusion of particle, homogenous–heterogeneous reactions and radiative heat flux effects are utilized to examine the behavior of heat and mass transport on the surface of thin needle. Suitable similarity variables and boundary layer approximations are used to turn into dimensionless one. After that, numerical outcomes are computed by a Shooting method (bvp4c) package in MATLAB. The incentives of sundry relevant parameters on the flow field, skin friction coefficient, heat transfer rate, temperature field and concentration distribution are portrayed via graphical tactic and have been elucidated in detail. The outcomes indicate that the temperature distribution is more versus rising values of radiative heat flux, magnetic parameter and Eckert number.

Measurement and Modeling of Latent Heat Release During Freezing of Aqueous Solutions in a Small Container

2000 ◽  
Author(s):  
Ramachandra V. Devireddy ◽  
John C. Bischof ◽  
Perry H. Leo ◽  
John S. Lowengrub
Keyword(s):  
Mass Transport ◽  
Heat Release ◽  
Latent Heat ◽  
Pure Water ◽  
Heat Of Fusion ◽  
Freezing Process ◽  
Latent Heat Release ◽  
Aqueous Systems ◽  
Heat And Mass Transport ◽  
Latent Heat Of Fusion

Abstract The latent heat of fusion, ΔHf of a cryobiological medium (a solute laden aqueous solution) is a crucial parameter in the cryopreservation process. The latent heat has often been approximated by that of pure water (∼ 335 mJ/mg). However, recent calorimetric (DSC - Pyris 1) measurements suggest that the actual magnitude of latent heat of fusion during freezing of solute laden aqueous systems is far less. Fourteen different pre-nucleated solute laden aqueous systems (NaCl-H2O, Phosphate Buffered Saline or PBS, serum free RPMI, cell culture medium, glycerol and Anti Freeze Protein solutions) were found to have significantly lower ΔHf than that of pure water (Devireddy and Bischof, 1998). In the present study additional calorimetric experiments are performed at 1, 5 and 20 °C/min in five representative cryobiological media (isotonic or 1× NaCl-H2O, 10× NaCl-H2O, 1× PBS, 5× PBS and 10× PBS) to determine the kinetics of ice crystallization. The temperature (T) and time (t) dependence of the latent heat release is measured. The experimental data shows that at a fixed temperature, the fraction of heat released at higher cooling rates (5 and 20 °C/min) is lower than at 1 °C/min for all the solutions studied. We then sought a simple model that could predict the experimentally measured behavior and examined the full set of heat and mass transport equations during the freezing process in a DSC sample pan. The model neglects the interaction between the growing ice crystals and is most appropriate during the early stages of the freezing process. An examination of the coefficients in the heat and mass transport equations shows that heat transport occurs much more rapidly than solute transport. Hence, the full model reduces to one in which the temperature profile is constant in space while the solute concentration profile obeys the full time and space dependent diffusion equation. The model reveals the important physical parameters controlling the mass transport at the freezing interface and further elucidates the experimental results, i.e. the temperature and time dependence of the latent heat release.

scholarly journals Heat flux analysis of Type-I ELM impact on a sloped, protruding surface in the JET bulk tungsten divertor

2018 ◽  
Vol 17 ◽  
pp. 182-187 ◽  
Author(s):  
J. Gaspar ◽  
J.W. Coenen ◽  
Y. Corre ◽  
R. Dejarnac ◽  
M. Firdaouss ◽  
...  
Keyword(s):  
Heat Flux ◽  
Flux Analysis ◽  
Type I
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