Characterization of external two-phase flow across tube bundles

• Grant number: 15/00854-5
• Support type: Scholarships abroad - Research Internship - Post-doctor
• Effective date (Start): June 01, 2015
• Effective date (End): November 30, 2015
• Field of knowledge: Engineering - Mechanical Engineering
• Principal Investigator: Gherhardt Ribatski
• Grantee: Fabio Toshio Kanizawa
• Supervisor abroad: Akio Tomiyama
• Home Institution: Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Local de pesquisa : Kobe University, Japan
• Associated to the scholarship: 14/06902-9 - Theoretical and experimental study of flow induced vibration during external two-phase flow across tube bundle, BP.PD

Abstract

The present proposal concerns a postdoctoral internship at Kobe University, institution with expertise in application of techniques of LDV (Laser Doppler Velocimetry) and SFV (Spatial Filter Velocimetry). The velocity profile of external flows across tube bundles affects the thermo-hydraulic performance and dynamic aspects of shell and tube heat exchangers, viz. heat transfer coefficient, pressure drop, and excitation and damping mechanisms of flow induced vibrations. The internship aims to provide to the postdoctoral fellow technical knowledge concerning these techniques, and also to allow the application of them for water single-phase and air-water two-phase flows across tube bundles. As main result of the activities performed during the internship period, it is expected a better knowledge about velocity profile of the external flow across tube bundles, which can allow the identification of excitation and damping mechanisms of flow induced vibrations, and also the development of accurate predictive methods for pressure drop, void fraction and heat transfer coefficient. This proposal has also the objective of complementing the education of the candidate, based on the postdoctoral internship in an internationally recognized research group. (AU)

Scientific publications

(6)

(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)

KANIZAWA, FABIO TOSHIO; RIBATSKI, GHERHARDT. Void fraction and pressure drop during external upward two-phase crossflow in tube bundles - part I: Experimental investigation. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, v. 65, p. 200-209, JUN 2017. Web of Science Citations: 5.

KANIZAWA, FABIO TOSHIO; RIBATSKI, GHERHARDT. Void fraction and pressure drop during external upward two-phase cross flow in tube bundles - part II: Predictive methods. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, v. 65, p. 210-219, JUN 2017. Web of Science Citations: 2.

KANIZAWA, FABIO TOSHIO; RIBATSKI, GHERHARDT. Two-phase flow patterns across triangular tube bundles for air-water upward flow. INTERNATIONAL JOURNAL OF MULTIPHASE FLOW, v. 80, p. 43-56, APR 2016. Web of Science Citations: 11.

KANIZAWA, FABIO TOSHIO; TIBIRICA, CRISTIANO BIGONHA; RIBATSKI, GHERHARDT. Heat transfer during convective boiling inside microchannels. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER, v. 93, p. 566-583, FEB 2016. Web of Science Citations: 24.

KANIZAWA, FABIO TOSHIO; MOGAJI, TAYE STEPHEN; RIBATSKI, GHERHARDT. A new model for flow boiling heat transfer coefficient inside horizontal tubes with twisted-tape inserts. INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID, v. 61, p. 55-68, JAN 2016. Web of Science Citations: 4.

KANIZAWA, FABIO TOSHIO; RIBATSKI, GHERHARDT. Void fraction predictive method based on the minimum kinetic energy. Journal of the Brazilian Society of Mechanical Sciences and Engineering, v. 38, n. 1, p. 209-225, JAN 2016. Web of Science Citations: 8.