Advanced search
Start date

Hydrodynamic and thermal characteristics of single and two-phase flow in micro pin fin heat sinks

Grant number: 19/02566-8
Support Opportunities:Regular Research Grants
Duration: May 01, 2019 - April 30, 2022
Field of knowledge:Engineering - Mechanical Engineering - Transport Phenomena
Principal Investigator:Elaine Maria Cardoso
Grantee:Elaine Maria Cardoso
Host Institution: Faculdade de Engenharia (FEIS). Universidade Estadual Paulista (UNESP). Campus de Ilha Solteira. Ilha Solteira , SP, Brazil
Associated researchers:Alessandro Roger Rodrigues


The growing demand for high-capacity heat-removal devices of smaller dimensions has required the scientific community to research solutions such as the use of microchannel-based heat sinks. These turned out to be an efficient solution as they reduced the amount of material and coolant used and could be designed in the dimensions of chips. By combining the geometry of the microchannels with saturated boiling of the refrigerant, it was possible to achieve dissipated heat fluxes in the order of 10 MW/m². However, the use of rectangular microchannels in convective boiling soon encountered some technical difficulties, such as the reverse flow of the fluid and thermal instabilities in the heat exchanger. Thus, new configurations of microchannels have been researched, among them the use of segmented microchannels or micro-pin fins. Micro-pin fin heat sinks have high thermal exchange efficiency due to the increase of the effective area of contact with the refrigerant, maintaining the advantages of applying the microchannels, but reducing the effect of instabilities. The present project aims to evaluate experimentally and analytically the thermal and hydrodynamic performance of a micro-pin fin heat sink by using HFE-7100 fluid (working fluid with low ozone depletion potential and low global warming potential). In the experimental part, the square-micro pillar arrays will be etched on a plain copper surface through micro-milling process by using CNC precision machining. Squares micro-fins of different length scales (i.e., height, diameter, and inter-fin space) were uniformly spaced on the plain copper surface. Two arrangements of heat sinks will be tested: one with orthogonal inlet to the direction of fluid flow, and another with inlet forming an angle of 45 ° to the flow direction. Experimental data for the heat transfer coefficient and pressure drop will be obtained under conditions of saturated two-phase flow, varying the applied heat flux and the mass velocity. The experimental data obtained, together with data from other authors, will be used to perform an analytical study on prediction methods present in the literature, in order to verify their reliability in the prediction of heat transfer coefficient (CTC) and pressure drop for microheat sinks. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
Articles published in other media outlets (0 total):
More itemsLess items

Scientific publications (14)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MANETTI, LEONARDO LACHI; RIBATSKI, GHERHARDT; DE SOUZA, REINALDO RODRIGUES; CARDOSO, ELAINE MARIA. Pool boiling heat transfer of HFE-7100 on metal foams. EXPERIMENTAL THERMAL AND FLUID SCIENCE, v. 113, . (13/15431-7, 17/13813-0, 19/02566-8)
GAJGHATE, SAMEER SHESHRAO; BARATHULA, SREERAM; CARDOSO, ELAINE MARIA; SAHA, BIDYUT BARAN; BHAUMIK, SWAPAN. Effect of staggered V-shaped and rectangular grooves copper surfaces on pool boiling heat transfer enhancement using ZrO2 nanofluids. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 43, n. 2, . (13/15431-7, 19/02566-8)
MANETTI, LEONARDO LACHI; OLIVEIRA HENRIQUES MOITA, ANA SOFIA; DE SOUZA, REINALDO RODRIGUES; CARDOSO, ELAINE MARIA. Effect of copper foam thickness on pool boiling heat transfer of HFE-7100. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v. 152, . (19/15250-9, 13/15431-7, 17/13813-0, 19/02566-8)
DA CUNHA, ALEX P.; MOGAJI, TAYE S.; DE SOUZA, REINALDO R.; CARDOSO, ELAINE M.. A Method for Measuring Contact Angle and the Influence of Surface-Fluid Parameters on the Boiling Heat Transfer Performance. JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME, v. 142, n. 9, . (13/15431-7, 17/13813-0, 19/02566-8)
SOUZA, R. R.; BARBOSA, F. M. SA; NOBREGA, G.; CARDOSO, E. M.; TEIXEIRA, J. C. F.; MOITA, A. S.; LIMA, R.. An innovative PDMS cell to improve the thermal conductivity measurements of nanofluids. THERMAL SCIENCE AND ENGINEERING PROGRESS, v. 42, p. 8-pg., . (13/15431-7, 22/03946-1, 19/02566-8)
SOUZA, R. R.; BARBOSA, F. M. SA; NOBREGA, G.; CARDOSO, E. M.; TEIXEIRA, J. C. F.; MOITA, A. S.; LIMA, R.. Experimental study of an innovative elastomer-based heat exchanger. CASE STUDIES IN THERMAL ENGINEERING, v. 49, p. 8-pg., . (13/15431-7, 22/03946-1, 19/02566-8)
GOODARZI, MARJAN; TLILI, ISKANDER; MORIA, HAZIM; CARDOSO, E. M.; ALKANHAL, TAWFEEQ ABDULLAH; ANQI, ALI E.; SAFAEI, MOHAMMAD REZA. Boiling flow of graphene nanoplatelets nano-suspension on a small copper disk. Powder Technology, v. 377, p. 10-19, . (13/15431-7, 19/02566-8)
KIYOMURA, IGOR SEICHO; NUNES, JESSICA MARTHA; DE SOUZA, REINALDO RODRIGUES; GAJGHATE, SAMEER S.; BHAUMIK, SWAPAN; CARDOSO, ELAINE MARIA. Effect of microfin surfaces on boiling heat transfer using HFE-7100 as working fluid. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 42, n. 7, . (13/15431-7, 17/13813-0, 19/02566-8)
DOS SANTOS FILHO, ERIVELTO; KIYOMURA, IGOR SEICHO; DE ANDRADE, BRUNO ALVES; CARDOSO, ELAINE MARIA. Pool boiling performance of HFE-7100 on hierarchically structured surfaces. CASE STUDIES IN THERMAL ENGINEERING, v. 28, . (17/04276-1, 14/19497-5, 14/07949-9, 19/02566-8, 13/15431-7)
MANETTI, LEONARDO LACHI; DE OLIVEIRA, IAGO LESSA; CARDOSO, ELAINE MARIA. Thermal efficiency of open-cell metal foams: Impact of foam thickness by comparing correlations and numerical modeling. APPLIED THERMAL ENGINEERING, v. 207, p. 12-pg., . (17/13813-0, 13/15431-7, 19/02566-8, 19/15250-9)
NUNES, JESSICA MARTHA; SOUZA, REINALDO RODRIGUES DE; RODRIGUES, ALESSANDRO ROGER; SAFAEI, MOHAMMAD REZA; CARDOSO, ELAINE MARIA. Influence of coated surfaces and gap size on boiling heat transfer of deionized water. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 42, n. 3, . (13/15431-7, 14/19497-5, 19/02566-8)
NUNES, JESSICA MARTHA; DE OLIVEIRA, JEFERSON DIEHL; COPETTI, JACQUELINE BIANCON; GAJGHATE, SAMEER SHESHRAO; BANERJEE, UTSAB; MITRA, SUSHANTA K.; CARDOSO, ELAINE MARIA. Thermal Performance Analysis of Micro Pin Fin Heat Sinks under Different Flow Conditions. ENERGIES, v. 16, n. 7, p. 13-pg., . (13/15431-7, 22/03946-1, 19/02566-8)
MANETTI, LEONARDO LACHI; HENRIQUES MOITA, ANA SOFIA OLIVEIRA; CARDOSO, ELAINE MARIA. A new pool boiling heat transfer correlation for wetting dielectric fluids on metal foams. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v. 171, p. 15-pg., . (19/02566-8, 17/13813-0, 19/15250-9)
MARSON, VINICIUS; SILVA, DOMISLEY DUTRA; CAMPOS SILVA, JOAO BATISTA; CARDOSO, ELAINE MARIA; CHAFIQ, T; ELHIBAOUI, A; ESSAAIDI, M; ZAZ, Y. Theoretical and Numerical Analysis of a Passive Cooling System for a Commercial Photovoltaic Module. PROCEEDINGS OF 2021 9TH INTERNATIONAL RENEWABLE AND SUSTAINABLE ENERGY CONFERENCE (IRSEC), v. N/A, p. 6-pg., . (13/15431-7, 19/02566-8)

Please report errors in scientific publications list using this form.