Simulation and Experimental Analysis of Laptop Air Multiplier Fan with Application of Coanda Effect

Cornelius Houben, Christopher and Shirley, Johnathan Tanjong (2025) Simulation and Experimental Analysis of Laptop Air Multiplier Fan with Application of Coanda Effect. Pena Journal of Flow Dynamics, 1 (1). pp. 28-40. ISSN 3093 - 6802

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Abstract

This paper presents a simulation and experimental analyses of an air multiplier fan design as an alternative laptop cooling solution, using the application of Coanda effect. This study involved computer-aided design (CAD) and modelling of the designs usingAutodesk Fusion360; fabrication of the proposed designs using fused deposition modelling (FDM) 3D printer; data collection of air velocity and sound level for the original equipment manufacturer (OEM) laptop fan and the 3D printed designs; computational fluid dynamic (CFD) simulation of the designs using ANSYS Fluent; and finally, validation and comparison of the data obtained from the experimental results to the simulation results. Important design characteristics were identified, such as using Eppler 473as the airfoil profile, slit angle at 30⁰ and a slit width of 1 mm. Two concept designs, named Design 1 and Design 2, were generated based on these design characteristics. The air velocity and sound level experimental data were collected using the 3D printed prototype of Design 1 and Design 2, using an anemometer and a sound level meter, respectively. CFD simulation for Design 1 and Design 2 was done using ANSYS Fluent with standard k-epsilon as the turbulence model. The result obtained show that both conceptual designs outperformed the OEM fan based on air velocity and sound level generated. The airfoil surface generated an increase in air velocity due to the Coanda effect and the absence of rotating parts minimises noise.

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