Library Subscription: Guest
Proceedings of CONV-14: International Symposium on Convective Heat and Mass Transfer.
June, 8-13, 2014, Kusadasi, Turkey

DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf


ISBN Print: 978-1-56700-356-7

ISSN Online: 2642-3499

ISSN Flash Drive: 2642-3502

EXPERIMENTAL INVESTIGATION ON CONVECTIVE HEAT TRANSFER ENHANCEMENT BY EHD

pages 845-860
DOI: 10.1615/ICHMT.2014.IntSympConvHeatMassTransf.640
Get accessGet access

ABSTRACT

The purpose of this study was to investigate the enhancement of forced convection heat transfer by the application of an electric field. The electric field creates an electro-hydrodynamic (EHD) induced air flow produced by columbic forces. A series of experiments were performed in a horizontal air flow channel equipped with different arrangements of wire-electrodes suspended above a conductive plate. These electrodes were arranged either parallel or perpendicular to the direction of primary air flow. Measurements were made on the system in order to determine the heat transfer coefficient and energy consumption. These results were used to determine an optimal configuration of electrode placement and system operating parameters (i.e. applied voltage, primary air flow velocity, wire-electrode to plate distance). In most cases the results show that heat transfer enhancement due to EHD is significant only at low Reynolds numbers. The most significant increase in heat transfer resulted in a single wire-electrode arranged perpendicular to the air flow direction (8x as compared to forced convection without EHD). However, the heat transfer enhancement was limited to a small area just below the electrode. In addition it hindered the primary air flow due to a localized increase in pressure drop. For cases of more than one parallel arranged wire-electrode the heat transfer enhancement was slightly less (6x) but more wide-spread over the conductive plate. Furthermore, the effect on the pressure drop was minimal.

Begell Digital Portal Begell Digital Library eBooks Journals References & Proceedings Research Collections Prices and Subscription Policies Begell House Contact Us Language English 中文 Русский Português German French Spain