Open Access
ARTICLE
EFFECT OF RIB HEIGHT ON HEAT TRANSFER ENHANCEMENT BY COMBINATION OF A RIB AND PULSATING FLOW
Shintaro Hayakawaa
, Takashi Fukuea,*,†
, Yasuhiro Sugimotoa
, Wakana Hiratsukab
, Hidemi Shirakawac
, Yasushi Koitod
a Kanazawa Institute of Technology, Ishikawa 921-8501, Japan
b Former student, Iwate University, Iwate 020-8551, Japan
c National Institute of Technology, Toyama College, Toyama 939-8630, Japan
d Kumamoto University, Kumamoto 860-8555, Japan
† Corresponding author. Email: fukue@neptune.kanazawa-it.ac.jp
Frontiers in Heat and Mass Transfer 2022, 18, 1-9. https://doi.org/10.5098/hmt.18.29
Abstract
This paper describes the effects of a combination of rib and pulsating flow on heat transfer enhancement in an mm-scale model that simulates the
narrow flow passages in cooling devices of downsized electronic equipment. This research aims to develop a novel water cooling device that increases
heat transfer performance while inhibiting pumping power. Our recent study has reported that a combination of pulsating flow and rib could enhance
heat transfer performance relative to the simple duct. In the present study, to verify the optimal rib height for improving heat transfer by pulsating flow,
we evaluated the relationship between heat transfer performance of pulsating flow and rib height through three-dimensional computational fluid
dynamics (CFD) analysis. The cooling performance index was calculated to evaluate the improvement of the heat transfer performance of pulsating
flow relative to a steady flow. Higher height ribs help to achieve higher heat transfer performance regardless of the flow pulsation. However, pressure
drop also increases significantly, and the level of the heat transfer enhancement by the higher ribs is dependent on the time-averaged Reynolds number.
By evaluating the cooling performance index, we clarified the optimum rib height that can enhance heat transfer while inhibiting the increase of the
pressure drop.
Keywords
Cite This Article
Hayakawa, S. (2022). EFFECT OF RIB HEIGHT ON HEAT TRANSFER ENHANCEMENT BY COMBINATION OF A RIB AND PULSATING FLOW.
Frontiers in Heat and Mass Transfer, 18(1), 1–9. https://doi.org/10.5098/hmt.18.29