NE (NEEP) 520: Two-Phase Flow and Heat Transfer

Nuclear Engineering and Engineering Physics

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NE (NEEP) 520 - Two-Phase Flow and Heat Transfer

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Catalog Description

520 Two-Phase Flow and Heat Transfer. I, Odd Yrs; 3 cr. Two-phase flow and heat transfer in engineering systems. Pool boiling and flow boiling. Phenomenological modeling. P: ME 361 or ChE 310 or equiv, ChE 320 or ME 364 or equiv.

Course Prerequisite(s)

See catalog description above.

Prerequisite knowledge and/or skills

First and Second Laws of Thermodynamics
Thermodynamic properties of gases, vapors, and gas-vapor mixtures
Energy-system analysis including power cycles, refrigeration cycles, and air-conditioning processes
Mass, momentum, and energy transport
Calculation of transport coefficients
Solution to problems in viscous flow, heat conduction and diffusion
Dimensional analysis
Mass, momentum, and heat transfer coeficients
Overall balances
Elementary applications

Textbook(s) and/or other required material

S. Mostafa Ghiaasiaan, Two-Phase Flow, Boiling, and Condensation, Cambridge University Press, Cambridge, First edition, 2008.

RecommendedG. F. Nellis and S. A. Kline, Heat Transfer, Cambridge University Press, Cambridge, First edition, 2008.

Course objectives

This course is directed toward teaching the student about physical phenomena and specific models that can be used as an aid in understanding two phase flow and heat transfer. These physical processes can occur during plant operation and therefore are needed for the design and analysis of the combustion systems, nuclear reactors and heat transfer industrial processes.

The focus is on internal two-phase flows as well as spray formation and the interaction of sprays with solid surfaces.

Upon completion of the course, students should be prepared to perform an elementary analysis of most gas-liquid two-phase systems and be prepared to use more advanced models presented in the literature.

Topics covered

See below.

Class/laboratory schedule

Topic (Reading in Ghiaasiaan) HW topic
Introduction, Fundamentals (1) Generating phase diagrams in EES and a mass transport intro
Fundamentals (1 - 2.5)
Gas-Liquid interfacial Phenomena (2.6 - 2.13) Interfacial waves on thin films, jets, jet breakup and bubble growth
Two-phase mixtures (3.1 - 3.5)
Particles and films (3.6 - 3.11) Homogeneous vs. separated flow model
Two-phase Flow regimes (4)
Two-Phase modeling - 1D (5.1-5.6) Flow regime-based pressure drop prediction
Two-phase modeling - multi dimensional (5.7-5.10)
Drift Flux Model (6) Drift Flux model and void fraction prediction
Flow regimes and interfacial area (7)
Pressure drop (8) Comparison of macro- and micro-scale heat exchangers
Two-phase flow in small passages (10)
Nucleate boiling (11.1-11.3) Electronics cooling via immersion
Film boiling and CHF (11.4-11.7)
Flow boiling (12.1-12.7) Flow regime-based heat transfer model
Flow regimes and impact on flow boiling (12.8-12.15)
CHF and post-CHF heat transfer (13) Analysis of the physical basis for CHF hypotheses
Flow boiling in small passages (14.1-14.3)
CHF in small passages (14.4-14.5) Two-phase microchannel cold plate for electronics thermal management
Fundamentals of condensation (15)
Internal flow condensation (16.1-16.4) The original Carrier Air Conditioner
Condensation on jets and droplets (16.5-16.9)
Choking in two-phase flow (17.1-17.5) Efervescent atomizer
Critical two-phase flow models (17.6-17.10)
Spray formation (Notes) Spray evaporation rate
Single droplet behavior (Notes)
Instabilities - droplet breakup (Notes) Atomization of the jet in cross-flow
Instabilities - droplet breakup (Notes)
Spray/Wall impingement (Notes) Spray cooling thermal management of high heat flux sources
Spray/wall impingement (Notes)

Assessment of student progress toward course objectives

Students will be assessed primarily based on their performance on the 15 homework/project assignments.

Person(s) who prepared this description

Tim Shedd

Copyright 2009 The Board of Regents of the University of Wisconsin System
Date last modified: 18-Nov-2009 11:52:13
Date created: 29-Oct-1999
Content by: neep@engr.wisc.edu
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