Begell House Inc.
Interfacial Phenomena and Heat Transfer
IPHT
2169-2785
1
2
2013
PREFACE: TWO PHASE SYSTEMS
vi-vii
10.1615/InterfacPhenomHeatTransfer.2013008473
Vladimir S.
Ajaev
Department of Mathematics, Clements Hall, Southern Methodist University, Dallas, TX,
75275, USA
Bofeng
Bai
State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University
Olga N.
Goncharova
Department of Differential Equations, Altai State University, 61, st Lenina, Barnaul, 656049, Russia; Institute of Computational Modeling of the Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk, Russia; Heat Transfer International Research Institute, Universite Libre de Bruxelles, Bruxelles, Belgium
Marc
Miscevic
Laboratoire Plasma et Conversion d'Energie (Laplace), UMR5213, Institut National Polytechnique-Universite Paul Sabatier-Centre National de la Recherche Scientifique (INP-UPS-CNRS), Toulouse, France
Two-phase flows
liquid films
instability
waves
condensation
jets
sprays
STABILITY OF THIN LIQUID FILMS FALLING DOWN ISOTHERMAL AND NONISOTHERMAL WALLS
93-138
10.1615/InterfacPhenomHeatTransfer.2013006655
Luis Antonio
Davalos-Orozco
Instituto de Investigaciones en Materiales, Departamento de Polimeros, Universidad Nacional Autonoma de Mexico, Ciudad Universitaria, Circuito Exterior S/N, Delegation Coyoacan, 04510 Ciudad de Mexico, Mexico
thin films down walls
thermocapillarity
thermal Marangoni
model equations
nonuniform heating
flows down cylinders
This paper reviews important results found in the past years on thin films falling down isothermal and nonisothermal walls. The discussion on isothermal flows is presented as the basis and background for the study of nonisothermal flows. Different model equations are presented and their approximations are discussed. Both linear and nonlinear results are surveyed on uniform and nonuniform heating of the wall. Also a review is given of the effect the curvature of the wall has on flows down vertical cylinders.
CIRCUMFERENTIAL NONUNIFORMITY OF WAVES ON LIQUID FILM IN ANNULAR FLOW WITHOUT LIQUID ENTRAINMENT
139-151
10.1615/InterfacPhenomHeatTransfer.2013006700
Sergey V.
Alekseenko
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, Lavrentyev Ave. 1, 630090, Novosibirsk,
Russia; Department of Physics, Novosibirsk State University, Novosibirsk, Russia
Andrey V.
Cherdantsev
Novosibirsk State University, Kutateladze Institute of Thermophysics, 1, Lavrentiev Ave., Novosibirsk 630090, Russia
Sergey V.
Isaenkov
Novosibirsk State University, 2, Pirogov St., Kutateladze Institute of Thermophysics, 1, Lavrentiev Ave., Novosibirsk 630090, Russia
Dmitriy M.
Markovich
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences
(IT SB RAS), 1, Lavrentyev Ave., Novosibirsk, 630090, Russia; Department of Physics, Novosibirsk State University (NSU), 1, Pirogov Str., Novosibirsk, 630090, Russia; Institute of Power Engineering, Tomsk Polytechnic University (TPU), 30, Lenin Ave., Tomsk, 634050, Russia
annular flow
gas shear
laser-induced fluorescence
wavy structure
The wavy structure of liquid film in downward annular flow without liquid entrainment is studied. Temporal evolution of instantaneous distributions of local film thickness over longitudinal and circumferential coordinates is studied using high-speed laser-induced fluorescence technique. Wavy structure in such flow consists of fast long-living primary waves and slow short-living secondary waves that are generated at the back slopes of primary waves. An automatic algorithm of identification of characteristic lines of primary waves is applied to data obtained in a number of circumferential positions. Contours of waves in each timeframe are identified to obtain temporal evolution of the shape of each wave in longitudinal and circumferential coordinates. Circumferential size of primary waves is estimated based on frequency of different kinds of waves. It is shown that variation of primary waves' height along circumferential coordinate is most likely caused by absorption and generation of secondary waves.
THEORETICAL AND EXPERIMENTAL STUDY OF CONVECTIVE CONDENSATION INSIDE A CIRCULAR TUBE
153-171
10.1615/InterfacPhenomHeatTransfer.2013008042
Igor V.
Marchuk
Kutateladze Institute of Thermophysics, Siberian Branch of the Russian Academy of Sciences, prosp. Lavrentyev 1, Novosibirsk; Novosibirsk State University, Pirogova 2, Novosibirsk, 630090, Russia
Yuriy
Lyulin
Institute of Thermophysics, Russian Academy of Sciences, Prosp. Lavrentyev 1, Novosibirsk, 630090, Russia
Oleg A.
Kabov
Kutateladze Institute of Thermophysics of the Siberian Branch of the Russian Academy of Sciences, 1, Acad. Lavrentyev Ave., Novosibirsk, 630090, Russia; Novosibirsk State University, 2, Pirogova str., Novosibirsk, 630090, Russia; Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russia
in-tube condensation
film-wise condensation
heat transfer coefficient
two-phase flow
liquid-vapor interface
numerical model
This paper presents a theoretical modeling and numerical and experimental investigations of the laminar convective condensation inside a circular smooth tube. The developed model includes the interaction between the surface tension, gravity, and shear stresses at the vapor-liquid interface and its cross influence on heat transfer. The influence of the gravity force, tube diameter, and temperature drop on the heat transfer at in-tube condensation of pure ethanol vapor is considered. The heat transfer coefficient as a function of the inclination angle of the condenser tube and the temperature drop between the vapor saturation and the wall temperatures is measured. A comparison of the experimental and numerical data is performed. The results of the numerical calculation are in good agreement with the experimental results. Numerical experiments have been carried out with the aim of predicting the time length of the transition to the steady-state regime after an abrupt change of the gravity level. It is shown that the transition time to the steady-state regime increases with an increase in the diameter of the condenser tube. The transition time to the steady-state regime under microgravity conditions is longer than that under normal gravity for a tube with a diameter larger than the value close to the capillary length of the working liquid.
FLASHING LIQUID JETS IN LOW-PRESSURE ENVIRONMENT
173-180
10.1615/InterfacPhenomHeatTransfer.2013007173
Wang-Fang
Du
State Nuclear Power Technology Corporation Research & Development Center, Beijing 102209, China; CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences. 15 Beisihuan
Xilu, Beijing 100190, China
Kai
Li
CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences,
Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Science, Beijing 100049,
China
Shuangfeng
Wang
Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, PR China; School of Electric Power, South China University of Technology, Guangzhou 510640, China
Jian-Fu
Zhao
CAS Key Laboratory of Microgravity, Institute of Mechanics, Chinese Academy of Sciences, 15 Beisihuan Xilu, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, 19A Yuquan Rd, Beijing, 100049, China
flashing liquid jet
vacuum
flow choking
In the present paper, highly expanded flashing liquid jets in a low-pressure environment are studied experimentally, particularly focusing upon the physics associated with liquid flashing regimes. A long, straight stainless steel capillary with an inner diameter of 0.23 mm and a length of 17.0 mm is used as the nozzle, which is connected with a syringe. Through a solenoid valve, a test vessel is connected with a vacuum chamber with a volume about 800 times bigger than that of the test vessel, in order to keep constant pressure inside the test vessel throughout every experimental run. Distilled water of about 1 mL is filled into the syringe at first, while the syringe is open to the ambient. Then, opening the solenoid valve, the air inside the test vessel will be evacuated quickly, resulting in a quick depressurization and a low backpressure inside the test vessel. The water in the syringe is then driven by the difference between the ambient pressure and the backpressure to form a highly expanded flashing liquid jet into the test vessel. For the case of low initial temperature and high backpressure, there is no evaporation, and then the flow of the liquid jet from the nozzle exit section remains intact and follows a straight path. On the other hand, if the initial temperature is high and/or the backpressure is low enough to lead a superheated exit condition, evaporation will take place, irregular evaporation waves around the liquid core are visible, and the jet shattering occurs. On further decreasing the backpressure, the liquid jet shatters giving rise to a cloud of droplets with a spray angle usually bigger than 90°, indicating a large number of nucleation sites and rapid bubble growth. It is also shown that there is flow choking behavior as the flow rate becomes constant and is insensitive to pressure reduction below some backpressure threshold.
VISCOSITY MEASUREMENT USING BREAKUP OF A LEVITATED DROPLET BY ROTATION
181-194
10.1615/InterfacPhenomHeatTransfer.2013007219
Rui
Tanaka
University of Tsukuba, Graduate School of System and Information Engineering, 1-1-1, Tennoudai, Tsukuba, Ibaraki, 305-8573, Japan
Satoshi
Matsumoto
Japan Aerospace Exploration Agency, Institute of Space and Astronautical Science, 2-1-1, Sengen, Tsukuba, Ibaraki, 305-8505, Japan
Akiko
Kaneko
University of Tsukuba, Faculty of Engineering of Information Engineering and
Systems, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
Yutaka
Abe
Department of Engineering Mechanics and Energy, Graduate School of System and Information Engineering, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, Ibaraki, 305-8573, Japan
viscosity measurement
electrostatic levitator
droplet
rotation
breakup
Thermophysical property measurement without container is used for high-temperature molten material. A microgravity environment is useful in order to achieve a containerless condition, and the levitation technique can also be used for containerless processing even on the ground. The purpose of this study is to establish a new measurement technique to measure viscosity in the moderate viscous range, which has no conventional measurement methods. In this study, a droplet is levitated by electrostatic force and induced to rotate. The dynamic behavior of the levitated droplet shape is observed, and the viscosity measurement is obtained by using breakup of the levitated droplet depending on the viscosity.