IDEAS home Printed from https://ideas.repec.org/a/wsi/ijmpcx/v32y2021i01ns0129183121500157.html
   My bibliography  Save this article

Magnetic field effects on natural convection and entropy generation of non-Newtonian fluids using multiple-relaxation-time lattice Boltzmann method

Author

Listed:
  • Aimon Rahman

    (Department of Mathematics and Physics, North South University, Dhaka 1229, Bangladesh)

  • Preetom Nag

    (Department of Mathematics and Physics, North South University, Dhaka 1229, Bangladesh2Center for Applied Scientific Computing, (CASE), North South University, Dhaka 1229 Bangladesh)

  • Md. Mamun Molla

    (Department of Mathematics and Physics, North South University, Dhaka 1229, Bangladesh2Center for Applied Scientific Computing, (CASE), North South University, Dhaka 1229 Bangladesh)

  • Sheikh Hassan

    (Department of Mathematics and Physics, North South University, Dhaka 1229, Bangladesh)

Abstract

The magnetic field effect on natural convection flow of power-law (PL) non-Newtonian fluid has been studied numerically using the multiple-relaxation-time (MRT) lattice Boltzmann method (LBM). A two-dimensional rectangular enclosure with differentially heated at two vertical sides has been considered for the computational domain. Numerical simulations have been conducted for different pertinent parameters such as Hartmann number, Ha=0−20, Rayleigh number, Ra=104−106, PL indices, n=0.6–1.4, Prandtl number, Pr=6.2(water), to study the flow physics and heat transfer phenomena inside the rectangular enclosure of aspect-ratio AR=2.0. Numerical results show that the heat transfer rate, quantified by the average Nusselt number, is attenuated with increasing the magnetic field, i.e. the Hartmann number (Ha). However, the average Nusselt number is increased by increasing the Rayleigh number, Ra and decreasing the PL index, n. Besides, the generation of entropy for non-Newtonian fluid flow under the magnetic field effect has been investigated in this study. Results show that in the absence of a magnetic field, Ha=0, fluid friction and heat transfer irreversibilities, the total entropy generation decreases and increases with increasing n and Ra, respectively. In the presence of the magnetic field, Ha>0, the fluid friction irreversibility tends to decrease with increasing both the shear-thinning and shear thickening effect. It is noteworthy that strengthening the magnetic field leads to pulling down the total entropy generation and its corresponding components. All simulations have been performed on the Graphical Processing Unit (GPU) using NVIDIA CUDA and employing the High-Performance Computing (HPC) facility.

Suggested Citation

  • Aimon Rahman & Preetom Nag & Md. Mamun Molla & Sheikh Hassan, 2021. "Magnetic field effects on natural convection and entropy generation of non-Newtonian fluids using multiple-relaxation-time lattice Boltzmann method," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 32(01), pages 1-32, January.
    • Handle: RePEc:wsi:ijmpcx:v:32:y:2021:i:01:n:s0129183121500157
    DOI: 10.1142/S0129183121500157
    as

    Download full text from publisher

    File URL: http://www.worldscientific.com/doi/abs/10.1142/S0129183121500157
    Download Restriction: Access to full text is restricted to subscribers
    File URL: https://libkey.io/10.1142/S0129183121500157?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Łukasz Łach & Dmytro Svyetlichnyy, 2024. "Recent Progress in Heat and Mass Transfer Modeling for Chemical Vapor Deposition Processes," Energies, MDPI, vol. 17(13), pages 1-60, July.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wsi:ijmpcx:v:32:y:2021:i:01:n:s0129183121500157. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Tai Tone Lim (email available below). General contact details of provider: http://www.worldscinet.com/ijmpc/ijmpc.shtml .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.