Paper Titles

Impact of the Thermophysical Properties of a Cuo-H₂O-Based Nanofluid on the Performance of a Cylindrical Solar Concentrator
p.3

Unsteady Two Dimensional Mixed Convection MHD Couple Stress Fluid Flow through an Inclined Stretching Sheet with Chemical Reaction
p.23

Influence of Non-Linear Radiation and Viscous Dissipation on the Convective Fluid Flow with Variable Viscosity and Quadratic Boussinesq Approximation across a Cylinder with Uniform Heat Flux at the Wall
p.37

Experimental Investigation for the Performance of the Solar Air Dryer with Vortex Generator
p.57

Effective Thermal Conductivity of Structured Porous Medium: Numerical Study
p.69

An Approach in Analyzing Longitudinal Fracture of Inhomogeneous Beams with Using Generalized Viscoplastic Models
p.79

Inhomogeneous Beam of Circular Cross-Section with Concentric Lengthwise Cracks: A Fracture Analysis with Considering Viscoplastic Behaviour
p.85

A Mixed FEM for Simulating Laminated Glass Beam Stiffness and Strength
p.91

A Test System for Plastic Metal Materials Subjected to Multi-particle Erosion via Air Ejector
p.97

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 419Effective Thermal Conductivity of Structured...

Effective Thermal Conductivity of Structured Porous Medium: Numerical Study

Article Preview

Abstract:

The paper presents a numerical study of thermal conductivity of porous structures using the Ansys software package. Unlike the well-known porous materials used in construction and engineering, it is proposed to use porous materials with an ordered law of cavity placement. The porous material proposed is formed by dividing the volume into cubes of equal size with a spherical cavity placed in the center of each cube. The numerical calculation of an effective thermal conductivity coefficient of a porous medium is performed using the Ansys Mechanical computer modeling tool. The values obtained are compared with solutions based on classical methods for determining the effective thermal conductivity of porous materials. A dependency graph of effective thermal conductivity in a porous material based on pores geometric parameters (distance between cavities, diameter of cavities), as well as an analytical dependence to obtain the effective thermal conductivity value is presented. Additive technologies available today provide producing the proposed porous material with an ordered law of cavity placement with any accuracy and any pore geometric parameters. Such materials open up wide opportunities for engineers, especially in the field of thermal power engineering, because it has predictable thermophysical and mechanical properties.

You might also be interested in these eBooks

Defect and Diffusion Forum Vol. 419

Info:

Periodical:

Defect and Diffusion Forum (Volume 419)

Pages:

69-76

DOI:

https://doi.org/10.4028/p-oepvt9

Citation:

Cite this paper

Online since:

October 2022

Authors:

A.I. Popov*, D.M. Bragin, Anton V. Eremin

Keywords:

Additive Technologies, Ansys, Porous Medium, Thermal Conductivity, Thermal Insulation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2022 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] R. Askari, S. Taheri, S. Hejazi, Thermal conductivity of granularporous media: A pore scale modeling approach, AIP Advancesю 5(9) (2015) 097106.

DOI: 10.1063/1.4930258

[2] R. Song, J. Liu, M. Cui, A new method to reconstruct structured meshmodel from micro-computed tomography images of porous media andits application, International Journal of Heat and Mass Transferю 109 (2017) 705-715.

DOI: 10.1016/j.ijheatmasstransfer.2017.02.053

[3] A.E. Khabbazi, J. Ellis, A. Bazylak, Developing a new formof the kozeny-carman parameter for structured porous media throughlattice-boltzmann modeling, Computers and Fluids. 75 (2013) 35-41.

DOI: 10.1016/j.compfluid.2013.01.008

[4] K. Yazdchi, S. Srivastava, S. Luding, Microstructural effects on thepermeability of periodic fibrous porous media, International Journal of Multiphase Flow. 37(8) (2011) 956-966.

DOI: 10.1016/j.ijmultiphaseflow.2011.05.003

[5] M. Ezzatabadipour, H. Zahedi, M. Keshtkar, Fluid flow simulationin a random elliptical porous medium by using the lattice boltzmannmethod, Journal of Applied Mechanics and Technical Physics. 58(3) (2017) 379-385.

DOI: 10.1134/s0021894417030014

[6] R. Mohebbi, A. Delouei, A. Jamali, M. Izadi, A. Mohamad, Pore-scale simulation of non-newtonian power-law fluid flow and forcedconvection in partially porous media: Thermal lattice boltzmannmethod, Physica A: Statistical Mechanics and its Applications. 525 (2019) 642-656.

DOI: 10.1016/j.physa.2019.03.039

[7] S. Nazari, D. Toghraie, Numerical simulation of heat transfer and fluidflow of water-cuo nanofluid in a sinusoidal channel with a porousmedium, Physica E: Low-Dimensional Systems and Nanostructures. 87 (2017) 134-140.

DOI: 10.1016/j.physe.2016.11.035

[8] I. Collins, J. Weibel, L. Pan, S. Garimella, A permeable-membranemicrochannel heat sink made by additive manufacturing, International Journal of Heat and Mass Transfer. 131 (2019) 1174-1183.

DOI: 10.1016/j.ijheatmasstransfer.2018.11.126

[9] G. Huang, Z. Min, L. Yang, P.-X. Jiang, M. Chyu, Transpirationcooling for additive manufactured porous plates with partition walls, International Journal of Heat and Mass Transfer. 124 (2018) 1076-1087.

DOI: 10.1016/j.ijheatmasstransfer.2018.03.110

[10] A. Mihalko, J. Felice, A. Madura, D. Piovesan, Use of polymer scaf-folding and electroplating to create porous metal structures, Journal of Engineering Materials and Technology, Transactions of the ASME. 141(3) (2019) 034501.

DOI: 10.1115/1.4042660

[11] Q. Xiong, H. Zahiri poor, M. Izadi, E. Assareh, Natural heat exchangein inhomogeneous porous medium using linear and quadratic porositydistribution, International Journal of Thermal Sciences. 161 (2021) 106731.

DOI: 10.1016/j.ijthermalsci.2020.106731

[12] J. Lu, A. Kan, W. Zhu, Y. Yuan, Numerical investigation on effectivethermal conductivity of fibrous porous medium under vacuum usinglattice-boltzmann method, International Journal of Thermal Sciences. 160 (2021) 106682.

DOI: 10.1016/j.ijthermalsci.2020.106682

[13] I. Kudinov, V. Kudinov, E. Kotova, A. Eremin, On one method of solv-ing nonstationary boundary-value problems, Journal of Engineering Physics and Thermophysics. 90(6) (2017) 1317-1327.

DOI: 10.1007/s10891-017-1689-4

[14] A. Eremin, E. Stefanyuk, O. Kurganova, V. Tkachev, M. Skvortsova, A generalized function in heat conductivity problems for multilayerstructures with heat sources, Journal of Machinery Manufacture and Reliability. 47(3) (2018) 249-255.

DOI: 10.3103/s1052618818030056

[15] V. Kudinov, A. Eremin, E. Stefanyuk, Analytical solutions of heat-conduction problems with time-varying heat-transfer coefficients, Journal of Engineering Physics and Thermophysics. 88(3) (2015) 688-698.

DOI: 10.1007/s10891-015-1238-y

[16] H. Shokouhmand, P. Bagherzade, M. Fazli, A. Shomali, Thermaldispersion effects on heat transfer of laminar gas flow in a microtubefilled with porous medium, International Journal of Thermal Sciences. 122 (2017) 281-291.

DOI: 10.1016/j.ijthermalsci.2017.09.002

[17] A. Popov, P. Iglin, K. Gubareva, T. Iglina, A. Doronin, Study oftemperature fields in a ball bearings bodies under boundary conditionsof the third kind. 791 (2020) 012017.

DOI: 10.1088/1757-899x/791/1/012017

[18] A. Eremin, K. Trubitsyn, A. Popov, K. Gubareva, Development of a mathematical model for heat transfer of moving fluids in a plane-parallel heater, 2020 International Multi-Conference on Industrial Engineering and Modern Technologies (FarEastCon), 2020.

DOI: 10.1109/fareastcon50210.2020.9271234

[19] Information on https://totalz.ru/produktsiya/3d-printer-anyform-l250-g3/.