Enhancement of 3D Mass and Heat Transfer within a Porous Ceramic Exchanger by Flow-Induced Vibration

Ramzi Rzig; Fathi Troudi; Nidhal Ben Khedher; Ismail Boukholda; Fuhaid Aziz Alshammari; Naif Khalaf Alshammari

doi:10.1021/acsomega.2c00907

Enhancement of 3D Mass and Heat Transfer within a Porous Ceramic Exchanger by Flow-Induced Vibration

ACS Omega. 2022 Apr 7;7(15):13280-13289. doi: 10.1021/acsomega.2c00907. eCollection 2022 Apr 19.

Authors

Ramzi Rzig^{1

2}, Fathi Troudi¹, Nidhal Ben Khedher^{3

2}, Ismail Boukholda⁴, Fuhaid Aziz Alshammari³, Naif Khalaf Alshammari³

Affiliations

¹ Higher Institute of Technological Studies of Kef, Higher Institute of Technological Studies (ISET), Boulifa University Campus, 7100 Kef, Tunisia.
² Laboratory of Thermal and Energy Systems Studies, National School of Engineering of Monastir, University of Monastir, 5000 Monastir, Tunisia.
³ Department of Mechanical Engineering, College of Engineering, University of Ha'il, 81451 Ha'il, Saudi Arabia.
⁴ Research Laboratory in Thermics and Thermodynamics of Industrial Processes, National School of Engineering of Monastir, University of Monastir, 5000 Monastir, Tunisia.

Abstract

This work investigates heat transfer enhancement for a porous ceramic heat exchanger. The effect of flow-induced vibration of exchanging air flow through porous tube banks has been tested. A numerical model able to assess the vibration effect on heat and mass transfer inside a porous ceramic exchanger has been carefully developed. A three-dimensional unstructured control volume finite element method (CVFEM) is developed to simulate the transport phenomena that arise during convective exchange. In this respect, several numerical tests have been conducted. The time evolution of temperature, liquid saturation, and pressure of the porous domain are analyzed and compared for two cases: with and without vibration. It is found that the vibration highly enhances the heat and mass transfer inside the ceramic exchanger. As a result, the gain of exchanging time to reach the thermal equilibrium between the hot air and the porous domain was 75% for the case of air vibration under sawtooth type at a frequency of f _v = 5 Hz and V _max = 10 m/s compared to nonvibrating exchange.