Slippage on Porous Spherical Superhydrophobic Surface Revolutionizes Heat Transfer of Non-Newtonian FluidShow others and affiliations
2022 (English)In: Advanced Materials Interfaces, ISSN 2196-7350, Vol. 9, no 34, article id 2201224Article in journal (Refereed) Published
Abstract [en]
In this study, a new strategy to achieve high-efficient heat transfer for non-Newtonian fluids with slippage using a stably prepared superhydrophobic coating is presented. A superhydrophobic coating is prepared on the inner surface of a sleeve at specific shear stress. The slippage and heat-transfer processes of the typical non-Newtonian fluid–1% carboxymethyl cellulose solutions on the superhydrophobic coating are investigated simultaneously. A novel porous spherical type of superhydrophobic coating with a contact angle of 168° is obtained. It is found that the shear stress in electrodeposition is a key parameter to control the morphology and wetting ability of the superhydrophobic coating. The slip length and enhancement factor of heat transfer for the non-Newtonian fluid on the coating are found in a range of 20–900 µm and 1.47 experimentally. A new parameter is proposed as Reynolds number Re divided by the dimensionless slip length ls* (Re/ls*) for the heat-transfer enhancement with slippage, which can be used as the guide for designing coating and selecting the operating conditions. The Re/ls* is <4, which can enhance the heat transfer via the slippage.
Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 9, no 34, article id 2201224
Keywords [en]
heat-transfer enhancement, non-Newtonian fluids, slippage, superhydrophobic surfaces, thermal resistance
National Category
Physical Chemistry
Research subject
Energy Engineering; Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-93737DOI: 10.1002/admi.202201224ISI: 000867409300001Scopus ID: 2-s2.0-85139752313OAI: oai:DiVA.org:ltu-93737DiVA, id: diva2:1706909
Funder
Swedish Energy Agency, 45957-1Swedish Research Council Formas, 2019-01162
Note
Validerad;2022;Nivå 2;2022-12-05 (joosat);
Funder: National Natural Science Foundation of China (22178160, 21838004, 21808102); State Key Laboratory of Materials‐Oriented Chemical Engineering (ZK202005); Youth Foundation of Jiangsu Province (BK202203499); Postgraduate Research & Practice Innovation Program of Jiangsu Province (SJCX21_0503); “Jiangsu Specially-Appointed Professor Plan” and “Excellent postdoctoral program” of Jiangsu Province
2022-10-282022-10-282022-12-05Bibliographically approved