Role of aspiration to enhance MHD convection in protruded heater cavity
by Nirmalendu Biswas; Nirmal K. Manna; Aparesh Datta; Dipak Kumar Mandal; Ali Cemal Benim
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 20, No. 6, 2020

Abstract: The implementation of aspiration (without fans/pumps) of the working medium can significantly intensify heat transfer in low power magneto-hydrodynamic (MHD) thermal applications. To explore its effectiveness over no-aspiration condition, a classical thermal cavity with protruded-heater (centrally mounted at bottom) is considered along with magnetic fields. The aspiration openings are provided at the bottom of the sidewalls (for passive partial suction) and in the middle of the top wall (for partial venting). For different strengths of magnetic fields and buoyancy, and heater sizes, the simulations are performed using an in-house code for a range of Rayleigh number (Ra), Hartmann number (Ha), and heater aspect ratio (A). The evolved results indicate substantial augmentation of heat transfer (up to 46%) from free aspiration. The imposed magnetic field prominently controls temperature and convective-flow fields. The aspiration plays a positive role in heat transfer enhancement under natural convection with and without a magnetic field.

Online publication date: Wed, 25-Nov-2020

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the Progress in Computational Fluid Dynamics, An International Journal (PCFD):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?


Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email subs@inderscience.com