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Theoretical and experimental study on velocity profile during single and two-phase flow across tube bundles based on spatial filter velocimetry technique

Grant number: 16/20200-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): May 01, 2017
Effective date (End): September 30, 2020
Field of knowledge:Engineering - Mechanical Engineering
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:Gherhardt Ribatski
Grantee:Douglas Martins Rocha
Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil


For the development of models that can accurately predict pressure drop, FIVs (Flow Induced Vibrations), and heat transfer is essential to characterize the flow field along the heat exchanger. However, due to the limited number of highly detailed results with reduced uncertainty, there are no fully established analytical models able to predict such parameters for a wide range of operating conditions. In this context, the Heat Transfer Research Group of EESC-USP has successfully developed studies on FIVs and two-phase flow across tube bundles. Thus, in order to obtain unpublished and accurate experimental results that contribute to better understanding of turbulence phenomena, FIVs, pressure drop and heat transfer in external flows of tube bundle, this project aims to perform a theoretical and experimental study to characterize the velocity field externally a tube bundle using the technique of spatial filter velocimetry (SFV). Based on the velocity profile results is expected to characterize the forces acting on the tubes and develop analytical models to predict these forces, the pressure drop and the void fraction. The SFV technique is still under development at the University of Kobe and at EESC-USP. Therefore, this research has great innovative potential, which allows to obtain significant results and contributes for the SFV technique improvement, especially when applied to two-phase flows. It is noteworthy that the experimental apparatus is under operating conditions. Thus, the experimental step for this project only requires the design of appropriate test sections for the correct application of SFV technique. Finally, the candidate fills the requirements to develop an excellent doctoral research. His master dissertation concerns an experimental investigation on multiphase flows area and he was awarded as the student with highest academic performance among graduates of Mechanical Engineering at EESC-USP in 2013. (AU)