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

## Authors

• Emaad Ansari School of Aerospace Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
• Umair Siddique Department of Mechanical Engineering, University of Pretoria, 0002, Pretoria, South Africa
• Sher Afghan Khan Department of Mechanical Engineering, International Islamic University Malaysia, 53100, Kuala Lumpur, Malaysia
• Mohammad Nishat Akhtar School of Aerospace Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia
• Elmi Abu Bakar School of Aerospace Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia

## Keywords:

Nusselt profile, Reynolds number, nozzle-target spacing

## 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.

2021-01-16

## How to Cite

Ansari, E. ., Siddique, U. ., Khan, S. A. ., Akhtar, M. N. ., & Abu Bakar, E. . (2021). Numerical Investigation of Mathematical Non-Dimensional Constant Representing Smoothness in the Nusselt Profile. CFD Letters, 12(6), 16–27. Retrieved from https://akademiabaru.com/submit/index.php/cfdl/article/view/3252

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