Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

An analysis of the effects of nanoparticles deposition on characteristics of the heating surface and ON pool boiling of water

Full text
Author(s):
Kiyomura, I. S. ; Manetti, L. L. ; da Cunha, A. P. ; Ribatski, G. ; Cardoso, E. M.
Total Authors: 5
Document type: Journal article
Source: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER; v. 106, p. 666-674, MAR 2017.
Web of Science Citations: 16
Abstract

Nanofluid pool boiling can modify the morphology of the heating surface and the physical properties of the base fluids, interfering directly on the vapor bubbles dynamics and on the heat transfer mechanisms. This paper concerns an experimental investigation of the effects of surface roughness and nanoparticle deposition on the contact angle, surface wettability and pool boiling heat transfer coefficient (HTC). Experiments were carried out using copper surfaces with different roughnesses, and deionized water as the working fluid at a pressure of 98 kPa and under saturated conditions. The nanostructured surfaces were produced by maghemite nanoparticle deposition, which is achieved by boiling selected mass concentrations of a Fe2O3-deionized water nanofluid (0.029 g/l and 0.29 g/l, corresponding to low and high nanofluid concentration, respectively). The highest heat transfer coefficients were obtained for the smooth surface with deposition of nanoparticles at low mass concentrations. In addition, as the nanofluid concentration increases the surface roughness also increases, and the higher the nanofluid concentration, the lower the contact angle of water on the coated surface. (C) 2016 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 13/15431-7 - Application of nanotechnology in thermal processes and energy conversion
Grantee:Elaine Maria Cardoso
Support Opportunities: Research Grants - Young Investigators Grants
FAPESP's process: 14/07949-9 - Effect of nano and micro structure surfaces on nucleate boiling
Grantee:Igor Seicho Kiyomura
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 14/19497-5 - Theoretical and experimental study of influence of nanofluid on the nucleate boiling regime
Grantee:Leonardo Lachi Manetti
Support Opportunities: Scholarships in Brazil - Master