Numerical thermodynamic analysis of heat storage porous duct under pulsating flow using lattice Boltzmann method
by Bayssain Amami; Raja Rabhi; Hacen Dhahri; Abdallah Mhimid
International Journal of Exergy (IJEX), Vol. 22, No. 4, 2017

Abstract: This paper deals with a thermodynamic analysis of sensible heat storage unit built by porous media. Analysis of the system's performances was tested through forced pulsating fluid flow, as thermal enhancement technique. Brinkman-Forchheimer-extended Darcy model is incorporated in momentum equations. Local thermal non-equilibrium (LTNE) between fluid and solid phases is adopted. A thermal Lattice Boltzmann model using three distribution functions has been proposed. Both energetic and exergetic efficiencies are determined for a complete cycle of charging and discharging as function of pulsating amplitude and for different emerging parameters values. It is found that the system's performance can be improved by a proper selection of operational parameters. The system's performances are getting better when increasing pulsating amplitude. With high pulsating intensity flow, the energetic and exergetic efficiencies augment, respectively, ~44% and 32% when porosity increases and 53% and 40% when augmenting Reynolds number and ~21% and 26% as pulsating frequency rises up.

Online publication date: Wed, 26-Apr-2017

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 International Journal of Exergy (IJEX):
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