Prediction of Slip Velocity at the Interface of Open-Cell Metal Foam Using 3D Printed Foams

Author:

Mustapha Khairul Azhar,Shikh Anuar FadhilahORCID,Mohd Saat Fatimah Al-ZahrahORCID

Abstract

An open-cell metal foam gains a lot of interest from researchers due to its unique porous structure, which provides high surface area and good tortuosity, as well as being lightweight. However, the same structure also induces a massive pressure drop which requires an optimum design to suit applications, for example, a partially filled setup or staggered design. Thus, better attention to the slip velocity at the interface between the porous structure and non-porous region is required to maximize its potential, especially in thermal fluid applications. This study proposed a slip velocity model of an open-cell metal foam by using a reverse engineering method and 3D printing technology. A series of experiments and a dimensionless analysis using the Buckingham-Pi theorem were used to compute the slip velocity model. Results show that the pressure drop increases with decreasing pore size. However, the blockage ratio effects would be more significant on the pressure drop with foams of smaller pore sizes. The proposed slip velocity model for an open-cell metal foam agrees with the experimental data, where the predicted values fall within measurement uncertainty.

Funder

KPT research

Publisher

MDPI AG

Subject

Colloid and Surface Chemistry,Chemistry (miscellaneous)

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