Modelling Study on Evaporative Freezing Process of Water Droplet in Artificial Snowmaking | Chapter 08 | New Trends in Physical Science Research Vol. 1

 A modelling study on the evaporative freezing process of water droplets was carried out in this paper in order to better understand artificial snowmaking and, as a result, to improve machine design. To accomplish this, mass and heat transfer theoretical models of a single water droplet cooling in an air space were devised and implemented in a numerical model created with the software COMSOL Multiphysics. On this process, the impacts of air temperature, relative humidity, and velocity, as well as the initial diameter and temperature of water droplets, were found and analysed, and their optimum ranges for snowmaking were determined.

Author(S) Details

G. El Achkar
Tianjin University of Commerce, Guangrong Rd 409, Beichen District, Tianjin, 300134, China and Trinity College Dublin, College Green, Dublin 2, Ireland.

B. Liu
Tianjin University of Commerce, Guangrong Rd 409, Beichen District, Tianjin, 300134, China.

R. Bennacer
ENS Paris-Saclay University, 61 Avenue du Pr´ esident Wilson, 94235 Cachan, France.

View Book:- https://stm.bookpi.org/NTPSR-V1/article/view/6469

Recovery Heat Flux at Superfluid Helium Film Boiling on the Cylindrical Heaters in Different Conditions | Chapter 5 | Newest Updates in Physical Science Research Vol. 9

 A set of two equations is presented for determining the recovery heat flow density. The hydrostatic difference determines the pressure distribution in the liquid; the Laplace pressure jump on the vapor-liquid interface is taken into account in one of them; and non-equilibrium factors in the vapour film are taken into account in another. This equation was derived using the correct correlation for the normal component of the momentum flux density tensor obtained using the two-fluid model. The Gorter-Mellink semi-empirical theory describes heat transmission in helium II in the second equation. The effects of various simplifications and special instances are investigated. The experimental data on superfluid helium boiling under various conditions is analysed using the mathematical model as a foundation. There is a good deal of consistency between the computed and experimental results.

Author (s) Details

Yu Yu Puzina
Department of Low Temperature National Research University, Moscow Power Engineering Institute, 14 Krasno kazarmennaya, Moscow, 111250 Russia.

A. P. Kryukov
Department of Low Temperature National Research University, Moscow Power Engineering Institute, 14 Krasno kazarmennaya, Moscow, 111250 Russia.

View Book :- https://stm.bookpi.org/NUPSR-V9/article/view/1936

A Detailed Account of An Efficient Acceleration of Solving Heat and Mass Transfer Equations in Capillary Porous Radially Composite Cylinder with Different Kinds of Boundary Conditions Using Programmable Graphics Hardware| Chapter 12 | Theory and Practice of Mathematics and Computer Science Vol. 3

 High attempts have been made to replicate a variety of scientific phenomena in engineering fields using the latest developments in computational technology. One such case is the simulation of heat and mass transfer in capillary porous media, which, in the study of a number of applications in science and engineering applications, is becoming increasingly important. This method of numerical solution of heat and mass transfer equations is, however, very time-consuming for capillary porous media. This paper therefore uses one of the acceleration methods developed in the graphics community that takes advantage of a graphical processing unit ( GPU) that is applied to the numerical options of such equations for heat and mass transfer. The programming model of the Navaid Compute Unified Computer Architecture (CUDA) provides a correct approach to applying parallel computing to the graphical processing unit framework. This paper indicates a true performance improvement when solving the equations of heat and mass transfer for capillary porous radically composite cylinders with many kinds of boundary conditions, running on GPU numerically. In a capillary porous cylinder, this heat and mass transfer simulation is carried out using the CUDA platform on the nVidia Quadro FX 4800 graphics card. We introduced numerical solutions using GPGPU 's highly parallel computing capabilities on nVidia CUDA. In the field of numerical solution to heat and mass transfer, we have demonstrated that GPU can operate significantly faster than CPU. Experimental findings for capillary porous radially composite cylinder show that our GPU-based implementation shows a substantial improvement in efficiency over CPU-based implementation and about 7 times the maximum speeds observed.

Author(s) Details

Dr. Hira Narang

Computer Science Department, Tuskegee University, Tuskegee, Alabama, USA.

Dr. Fan Wu
Computer Science Department, Tuskegee University, Tuskegee, Alabama, USA.

Abdul Rafae Mohammed

Computer Science Department, Tuskegee University, Tuskegee, Alabama, USA.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/307