Numerical Investigation of Mathematical Non-Dimensional Constant Representing Smoothness in the Nusselt Profile

Abstract

Cooling of devices using air-jet and other fluid impingement has acquired pace in the manufacturing and electronic device industries. The cooling of the surface using liquid jets is studied using the Nusselt distribution profile. The pattern of the Nusselt profile becomes non-uniform when some parameters are wrongly selected. This may lead to heating of some locations instead of cooling of the surface. Thus research for keeping the Nusselt profile uniform is a primary task. The Nusselt profile depends mainly on the Reynolds number (Re) and nozzle-target spacing (Z/d). Therefore, the current study numerically evaluates the value of constant, which is a ratio of Reynolds number and nozzle-target spacing (C = Re/ (Z/d)) up to which the Nusselt profile remains uniform. The value of constant C is found to be 7400. Also, the present work uses a computational model for study, which is validated using grid independence test and turbulence modeling.

Experimental Investigation of Local Nusselt Profile Dissemination to Augment Heat Transfer under Air Jet Infringements for Industrial Applications

“…The combined effect of increased local momentum and significant temperature differences within the plate and its surroundings leads to the highest Nusselt number at the stagnation region. Gulhane and Siddique [6], Umair et al, [7], and Ansari et al, [8] presented comprehensive results on the location of the first local elevation in Nusselt number. A local increase in the Nusselt number was observed due to a local first elevation curve of Nu, occurring over stagnation and transition regions.…”

Forced Air Cooling for Battery Module on Series Connected Batteries: Temperature Variation Due to Non-Uniform Flow Across Channel

“…Additionally, active cooling employs circulation of a cooling liquid within the battery module or pack as described by Akinlabi and Solyali [15] and Al Shdaifat et al, [16]. The cooling effectiveness of the method typically depends on the Nusselt number as described by Ansari et al, [17]. Higher Nusselt number promotes higher foced convection coefficient which essentially increases rate of heat removal at solid surface.…”