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Experimental Investigation of Heat Transfer and Pressure Drop Characteristics for Vertical Downflow using Traditional and 3D-printed Mini tubes
J.H. Chen1; L.M. Tam1,2; A.J. Ghajar3
2022-07
Conference NameThe Third International Symposium on Thermal-Fluid Dynamics 2022
Conference Date2022.07.27-2022.07.31
Conference PlaceXi an, China
CountryChina
Abstract

In this study, a detail investigation on the influences of different manufacturing techniques and flow direction on the pressure drop and heat transfer in the developing and fully developed regions of mini tube under different flow regimes is introduced. The purpose of this research is to experimentally investigate the pressure drop and heat transfer characteristics using 3D printed tube and traditional cold rolled tube in the vertical direction under isothermal and non-isothermal boundary conditions. Experiments were conducted using distilled water (Prandtl numbers varying from 4 and 7) at Reynolds numbers of 800–10000 with heat fluxes between 30 and 500 kW/m². Test tubes with inner diameters of 2 mm were used, and the average surface roughness were 1.6μm and 15.3μm, respectively. The results were compared with previous studies. It was verified that the heat transfer and pressure drop characteristics are almost the same for the traditional tube and 3D printed tube in laminar region. However, for the turbulent region, the friction factors and heat transfer coefficients for the 3D printed tube increase in comparison to the traditional tube. In addition, the 3D printed tube entered the transition region earlier and end transition later. Correlations were developed to determine the friction factors and heat transfer coefficients for turbulent region, and they give appropriate predictions.

KeywordHeat Transfer Pressure Drop 3d Printed Mini Tube
Indexed BySCIE
Funding Project新型耐蝕耐磨機械合金化塗層的制備及海洋環境服役性能研究
WOS Research AreaElectrochemistry
WOS SubjectElectrochemistry
WOS IDWOS:000445777200015
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Citation statistics
Cited Times [WOS]:28   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionFaculty of Science and Technology
DEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorJ.H. Chen; L.M. Tam
Affiliation1.Department of Electromechanical Engineering, University of macau, China
2.Institute for the Development and Quality, Macau SAR, China
3.Oklahoma state University, School of Mechanical and Aerospace Engineering, Stillwater Oklahoma, USA
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
J.H. Chen,L.M. Tam,A.J. Ghajar. Experimental Investigation of Heat Transfer and Pressure Drop Characteristics for Vertical Downflow using Traditional and 3D-printed Mini tubes[C],2022.
APA J.H. Chen,L.M. Tam,&A.J. Ghajar.(2022).Experimental Investigation of Heat Transfer and Pressure Drop Characteristics for Vertical Downflow using Traditional and 3D-printed Mini tubes..
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