Masters Theses

Keywords and Phrases

convective heat transfer; hot wire anemometry; lattices; mass transfer; naphthalene sublimation; unit cells

Abstract

"Honeycombs, metal foams, and lattice structures all provide a way to increase heat transfer due to better fluid mixing and larger surface area. Specifically, lattice structures can be a great way to provide heat transfer enhancement due to the ability to customize and optimize the unit cell geometry. In this research, a novel yet simple unit cell geometry is chosen for study. Four different configurations are tested in a lower Reynolds number range, 300–1800: single unit cell, two-unit cells in series, three-unit cells in series, and a 3x3 unit cell array. The Sherwood number of each configuration is found by using the naphthalene sublimation technique. Due to the parts being constructed using additive manufacturing, the partially localized Sherwood number can be found for each truss and also averaged over the area of the naphthalene-coated parts. The single unit cell configuration’s overall performance is similar to the center unit cells in the array; however, the wake is quite different behind each. The wake difference in the array is likely due to contribution of additional turbulence by the outside unit cells. The back unit cell on the two in series configuration has a slight reduction in performance compared to a single unit cell, and the back unit cell on the three-unit cells in series has no noticeable reduction in performance compared to the back unit cell in the two in series configuration. When comparing the overall transfer to a cylinder in crossflow, the single unit cell, two-unit cells in series, three-unit cells in series, and array exhibit from 5% to over 40% higher Sherwood numbers, respectively"--Abstract, p. iv

Advisor(s)

Homan, Kelly

Committee Member(s)

Koylu, Umit O. (Umit Ozgur)
Stutts, Daniel S.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical and Aerospace Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Spring 2023

Pagination

xi, 70 pages

Note about bibliography

Includes_bibliographical_references_(pages 67-69)

Rights

© 2023 Benjamin Gabriel Mackey, All Rights Reserved

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 12296

Electronic OCLC #

1426305438

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