Numerical study of the flow of R1270-based nanorefrigerants in a circular tube subject to uniform heat flux

Micro & nano letters

article

Mohammed Zohud¹  Ahmed Ouadha²  Redouane Benzeguir¹ 

[1] Laboratoire de Carburants Gazeux et Environnement, Université des Sciences et de la Technologie Mohamed Boudiaf d'Oran;Laboratoire des Sciences & Ingénierie Maritimes, Université des Sciences et de la Technologie Mohamed Boudiaf d'Oran

关键词: computational fluid dynamics;    turbulence;    nanofluidics;    convection;    pipe flow;    nanoparticles;    refrigerants;    numerical analysis;    organic compounds;    two-phase flow;    alumina;    copper compounds;    silicon compounds;    zinc compounds;    R1270-based nanorefrigerants;    uniform heat flux;    turbulent convective heat transfer;    propylene-based nanorefrigerant;    Reynolds number;    nanoparticle diameter;    circular tube;    CFD code Fluent;    convective heat transfer coefficients;    nanoparticle volume concentration;    CuO;    SiO2;    ZnO;    Al2O3;   

DOI  :  10.1049/mnl.2018.5132

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Hedera helix L. plant belongs to the family Araliaceae that provide a host of bioactive compounds (mainly saponins) of important biological activities, like spasmolytic, secretolytic, anti-inflammatory, and antibacterial activities. Literature survey revealed that there was no previously study concerning H. helix L. which is cultivated in Iraq, so we decided to carry out this study which include extraction, isolation, purification and identification of biologically important triterpenoid saponin hederacoside C from leaves of H. helix L. Extraction of hederacoside C was carried out using two methods; in the first method maceration  was done with methanol 99.8% and in the second method soxhlet extraction with ethanol 99.8%, was followed, then  fractionation using column chromatography. Preliminary identification of this saponin hederacoside C was done using thin layer chromatography (TLC) where different solvent systems had been tried. Liebermann-Burchard reagent where used for detection. The most suitable extraction method was fully described in this study. The characterization of the isolated hederacoside C was carried out using melting point (M.P.), thin layer chromatography (TLC), FT-IR, and high performance liquid chromatography (HPLC).

【 授权许可】

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