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3D Forced Convection in a Box Containing Two Cylindrical Heat Sources

Said Bouabdallah, Badia Ghernaout, Abderrahmane Bellaouar, Abdelwafi Bouras, Abdehamid Ghazel
2020 Advances in Modelling and Analysis B  
Forced convection is a special type of heat transfer in which fluids are forced to move, in order to increase the heat transfer.  ...  The aim of this study is to investigate in a numerical simulation of forced convection in a cubic cavity containing two cylindrical heat sources in the middle.  ...  ACKNOWLEDGMENT The authors gratefully acknowledge the Directorate General of Scientific Research and Technological Development (DGSRTD)to support this work, and fund the LME laboratory for carrying out  ... 
doi:10.18280/ama_b.631-404 fatcat:hul5znlm5zer7lxou2srjjjid4

Simulation of Horizontal Centrifugal Casting: Mold Filling and Solidification

Jan Bohacek, Abdellah Kharicha, Andreas Ludwig, Menghuai Wu
2014 ISIJ International  
The model accounts for centrifugal force, Coriolis force, shear force, gravity and convective and diffusive energy transport. The solidification front was tracked by fulfilling the Stefan condition.  ...  With increase liquid height the amplitude of the free surface waves also increases. Fig. 1. A schematic of the horizontal centrifugal casting of an outer shell of a large work roll.  ...  Acknowledgements Financial support by the Austrian Federal Government (in particular from the Bundesministerium fuer Verkehr, Innovation und Technologie and the Bundesministerium fuer Wirtschaft, Familie  ... 
doi:10.2355/isijinternational.54.266 fatcat:77mvfri3kfflzgd2evpyferiem

Particle Deposition onto Enclosure Surfaces [chapter]

De-Ling Liu
2010 Developments in Surface Contamination and Cleaning  
Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently  ...  In addition, a quantitative approach using the concept of flux and the underlying physical mechanisms that govern particle deposition are briefly described. 300 20  ...  Air Force Space and Missile Systems Center.  ... 
doi:10.1016/b978-1-4377-7830-4.10001-5 fatcat:ug2lbxc6qvh2bgoed6jvor3b4u

Liquid–Solid Flow Characteristics in Vertical Swirling Hydraulic Transportation with Tangential Jet Inlet

Jiyang Qi, Jie Yin, Fei Yan, Ping Liu, Tieli Wang, Chen Chen
2021 Journal of Marine Science and Engineering  
In order to improve the efficiency and safety of vertical hydraulic transport systems for non-spherical particles, a new pipeline transport system with a tangential jet inlet is adopted in this study,  ...  Furthermore, the concentration gap and axial drag force gap between particles of various shapes are reduced with the effect of swirling flow, the particle concentration increases, and the particles of  ...  [6] analyzed the momentum transfer of particles and carriers in horizontal pipelines and proposed a new heterogeneous velocity distribution model. Asakura et al.  ... 
doi:10.3390/jmse9101091 fatcat:t2ktu37ojnfhzoilvu7lcg3g7y

Smoke Plume Trajectory Modeling

K.B McGrattan
2003 Spill science & technology bulletin  
In the part 2, the procedure of modelling has been explained in detail and several results have been analysed and mutually displayed. consisting of (1) an annulus around the original cylinder; (2) a cylinder  ...  The results of modelling are consistent with the real cases acquired by satellite imageries at the same geographic location where bushfire took place historically.  ...  Zhao at Shanghai Jiao Tong University for supplying desired data used in this research.  ... 
doi:10.1016/s1353-2561(03)00053-7 fatcat:loqw5zlnfbdaje5bmh37tys6jq

Self-induced Marangoni flow in evaporating alcoholic solutions

Anselmo Cecere, Cosimo Buffone, Raffaele Savino
2014 International Journal of Heat and Mass Transfer  
The experimental results are explained on the basis of a numerical model including evaporation, vapor diffusion, heat and mass transfer from the liquid to the surrounding ambient and the Marangoni effects  ...  The spinning frequency and the average tracer particles velocity decrease for increasing water content in the mixtures.  ...  We are also indebted with Prof. S. Van Vaerenbergh for financial support to the student mobility.  ... 
doi:10.1016/j.ijheatmasstransfer.2014.07.055 fatcat:v63wuyzpq5efnlzcj7a4habmiq

Enhanced CO2 diffusion in wedges

M Aguilera
2002 Chemical Engineering Journal  
10 A porous media is a collection of particles of different shapes and sizes. Particles can be deformed such that they rarely contact at a point, but on extended surfaces.  ...  It was found that filaments have an active role in the enhanced diffusion process between carbon dioxide and liquid hydrocarbons.  ...  Renner [12] showed that 73 different values of diffusion coefficients could be obtained in 74 Berea sandstone depending on the vertical or horizontal po-75 sition of the rock.  ... 
doi:10.1016/s1385-8947(01)00209-1 fatcat:grd5cujxo5eofbbnnhne3f26ye

NUMERICAL STUDY OF MIXED CONVECTION IN CYLINRICAL CZOCHRALSKI CONFIGURATION FOR CRYSTAL GROWTH OF SILICON

Atia Aissa, Bouabdallah Said, Teggar Mohamed, Benchatti Ahmed
2015 International Journal of Heat and Technology  
A numerical study of the mixed convection of liquid metal in Czochralski configuration for crystal growth was carried out.  ...  The results showed that increasing of Richardson number increases the velocity of the fluid in the cavity and reduces the rate of heat transfer.  ...  obvious 3D shape when the crystal is not rotating to an almost 2D shape with increase in rotation rate.  ... 
doi:10.18280/ijht.330106 fatcat:a7l4eyv5uza7xlpdebwakn4h74

Dense gas-particle suspension upward flow used as heat transfer fluid in solar receiver: PEPT experiments and 3D numerical simulations

Renaud Ansart, Pablo García-Triñanes, Benjamin Boissière, Hadrien Benoit, Jonathan P.K. Seville, Olivier Simonin
2017 Powder Technology  
This is an author-deposited version published in : http://oatao.univ-toulouse.fr/ Eprints ID : 17294 To link to this article : A B S T R A C T A dense particle suspension, also called an upflow bubbling  ...  Both numerical predictions and PEPT measurements describe an upward flow at the centre of the transport tube with a back-mixing flow near the wall which influences the heat transfer mechanism.  ...  The authors acknowledge the European Commission for cofunding the "CSP2" Project -Concentrated Solar Power in Particles -(FP7, project N 282 932).  ... 
doi:10.1016/j.powtec.2016.11.006 fatcat:z76alqnmcfavpf5f3eyt6owolu

Granular materials composed of shape-anisotropic grains

Tamás Börzsönyi, Ralf Stannarius
2013 Soft Matter  
The specific properties of systems composed of shape-anisotropic (elongated or flattened) particles have attracted increasing interest in recent years.  ...  Granulate physics has made considerable progress during the past decades in the understanding of static and dynamic properties of large ensembles of interacting macroscopic particles, including the modeling  ...  Kirsten Harth is acknowledged for discussions, literature references, and providing a figure. Sandra Wegner is acknowledged for contributing a figure. We thank Tanya Ostapenko for proofreading.  ... 
doi:10.1039/c3sm50298h fatcat:sibxhnsllvblzls3dnz6erejza

Numerical simulation and experimental investigation of gas–powder flow from radially symmetrical nozzles in laser-based direct metal deposition

Srdja Zekovic, Rajeev Dwivedi, Radovan Kovacevic
2007 International journal of machine tools & manufacture  
The obtained results are in good agreement with the experimental ones, and they provide a good insight into the process phenomena. r  ...  Threedimensional (3D) multi-phase gas-powder flow structures of radially symmetrical nozzles are modeled using computational fluid dynamics methods.  ...  Michael Valant, research engineer at the Research Center for Advanced Manufacturing, Southern Methodist University, for his contribution in the experimental part of this work.  ... 
doi:10.1016/j.ijmachtools.2006.02.004 fatcat:baablvdjargwtekfe772rwwcky

Measurement of Thermal Conductivity along the Radial Direction in a Vertical Cylindrical Packed Bed

Swaren Bedarkar, Nurni Neelakantan Viswanathan, Nidambur Bharatha Ballal
2015 Journal of Powder Technology  
Heat transfer in packed beds and their thermal response have been of great interest for scientists and engineers for the last several years, since they play a crucial role in determining design and operation  ...  To determine the effective thermal conductivity a new transient methodology is proposed. The results obtained were compared with the models proposed by ZBS and Kunii and Smith.  ...  Smith developed an expression for effective thermal conductivity with stagnant fluid based on one-dimensional heat diffusion model for a unit cell of packed spheres.  ... 
doi:10.1155/2015/584538 fatcat:jmamtizmpfhxpn5ktsltp3da2i

Effect of Blade Speed on Granular Flow and Mixing in a Cylindrical Mixer

G. R. Chandratilleke, Y. C. Zhou, A. B. Yu, J. Bridgwater
2010 Industrial & Engineering Chemistry Research  
Recirculating flows are observed in both horizontal and cylindrical sections of the bed, providing a mixing mechanism.  ...  These are the regions where particle breakage or fracture can happen. Interparticle forces in the bed as a whole increase with the blade speed.  ...  Knight et al. 11 developed a semianalytical model for calculating the torque for mixing of powder in a vertical cylinder fitted with a shaft carrying flat vertical blades.  ... 
doi:10.1021/ie901581t fatcat:u6uetkmjxva33may3cpinlfzna

Coarse-Grained Molecular Dynamics Modeling of Defective Erythrocyte Membrane and Sickle Hemoglobin Fibers [article]

He Li
2017 arXiv   pre-print
In this work, we develop a two-component coarse-grained molecular dynamics (CGMD) model for simulating the erythrocyte membrane.  ...  By tuning the interaction potential parameters, diffusivity and bending rigidity of the membrane model can be controlled.  ...  Summary We apply a two-component RBC membrane model to study band-3 diffusion in the normal RBC membrane and in the membranes with defective vertical and horizontal interactions.  ... 
arXiv:1707.07621v1 fatcat:uukdeb3ksva2xnry4ggltghb34

Single Walled Carbon Nanotube Effects on Mixed Convection heat Transfer in an Enclosure: a LBM Approach

M. Jafari, M. Farhadi, K. Sedighi
2014 Transport Phenomena in Nano and Micro Scales  
A theoretical model is used for effective thermal conductivity of the nanofluid containing Carbon nanotubes. This model covers different phenomena of energy transport in nanofluids.  ...  The Study presents a numerical treatment based on LBM to model convection heat transfer of Carbon nanotube based nanofluids.  ...  Figure 5 shows the values of Temperature at vertical midsection of the cavity and also u and v component of the velocity at horizontal mid-section of the cavity for a special issue.  ... 
doi:10.7508/tpnms.2014.01.002 doaj:f8197647b8a84dcfb5cdf9ef9c96bd17 fatcat:76yc6vwqsbfqxhcghlsxljdsla
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