by Yongbao Xin. / Thesis (Ph.D.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (leaves 113-117). / by Yongbao Xin. / ABSTRACT --- p.I / ACKNOWLEDGMENTS --- p.II / LIST OF FIGURES --- p.V / LIST OF TABLES --- p.VIII / CHAPTERS / Chapter 1. --- INTRODUCTION --- p.1 / Chapter 1.1 --- Turbulence: A Long-standing and Unsolved Problem --- p.1 / Chapter 1.2 --- Rayleigh-Benard Convection --- p.3 / Chapter 1.3 --- High Rayleigh Number Rayleigh-Benard Convection --- p.5 / Chapter 1.3.1 --- The Rayleigh number dependence of Nu --- p.6 / Chapter 1.3.2 --- Large-scale flow in RB convection --- p.7 / Chapter 1.3.3 --- Thermal plumes in the high Ra convection --- p.9 / Chapter 1.4 --- Velocity Field and Viscous Boundary Layer Measurement in Rayleigh-Benard Convection --- p.11 / Chapter 2. --- SETUP OF RAYLEIGH-BENARD CONVECTION --- p.14 / Chapter 2.1 --- The Convection Cells --- p.14 / Chapter 2.2 --- Built Up the Convection --- p.18 / Chapter 2.2.1 --- Preparations of fluid --- p.18 / Chapter 2.2.2 --- Procedures to have a stable convective state --- p.19 / Chapter 2.3 --- Measurements of the Nusselt Number --- p.22 / Chapter 3. --- VELOCITY MEASUREMENT IN RAYLEIGH-BENARD CONVECTION --- p.25 / Chapter 3.1 --- Dual-beam Incoherent Cross-correlation Spectroscopy --- p.25 / Chapter 3.1.1 --- Theory of the technique --- p.25 / Chapter 3.1.2 --- Experimental setup --- p.31 / Chapter 3.1.3 --- Calibration and applications of the technique --- p.34 / Chapter 3.1.4 --- Summary --- p.41 / Chapter 3.2 --- Velocity Measurement in Turbulent Rayleigh-Benard Convection --- p.42 / Chapter 3.2.1 --- Cross-correlation functions in turbulent convection --- p.42 / Chapter 3.2.2 --- Some experimental details --- p.43 / Chapter 3.2.3 --- Some issues to be concerned in the velocity measurement --- p.47 / Chapter 4. --- LARGE SCALE CIRCULATION IN RAYLEIGH-BENARD CONVECTION --- p.50 / Chapter 4.1 --- Large Scale Circulation in Cylindrical Cells --- p.50 / Chapter 4.1.1 --- "Large scale circulation in cells of AR =1,2，and 44" --- p.50 / Chapter 4.1.2 --- Flow pattern in AR = 0.5 cell --- p.55 / Chapter 4.1.3 --- Velocity profiles along vertical central axis --- p.57 / Chapter 4.1.4 --- Prandtl number dependence of the boundary layer properties --- p.61 / Chapter 4.2 --- Large Scale Circulation in Cubic Cell --- p.65 / Chapter 4.2.1 --- Large scale flows near the plate and near the sidewall --- p.65 / Chapter 4.2.2 --- Velocity profiles along the vertical axis --- p.68 / Chapter 4.3 --- Summary --- p.73 / Chapter 5. --- SCALING PROPERTIES OF THE BOUNDARY LAYER QUANTITIES --- p.75 / Chapter 5.1 --- Ra Dependence of Boundary Layer Properties --- p.75 / Chapter 5.1.1 --- Scaled velocity and standard deviation profiles at different Ra --- p.75 / Chapter 5.1.2 --- Scaling properties of the maximum mean velocityvm and the maximum standard deviation σm --- p.76 / Chapter 5.1.3 --- Scaling properties of the shear rate γv and the gradient of the standard deviation yσ --- p.80 / Chapter 5.1.4 --- Scaling properties of boundary layer thickness --- p.84 / Chapter 5.2 --- Aspect-ratio Dependence of Boundary Layer Properties --- p.87 / Chapter 5.2.1 --- AR dependence of vm(Ra) and σm(Ra) --- p.87 / Chapter 5.2.2 --- AR dependence of the shear rate --- p.89 / Chapter 5.2.3 --- AR dependence of the viscous boundary layer thickness --- p.89 / Chapter 5.2.4 --- Vertical motion of the coherent structures in AR = 0.5 cell --- p.92 / Chapter 5.3 --- Summary --- p.93 / Chapter 6. --- CONCLUSION --- p.96 / APPENDIX / Chapter A1. --- NUMERICAL ANALYSIS OF THE CORRELATION FUNCTION EQ. 315 --- p.100 / Chapter A1.1 --- Analysis with Gaussian PDF Distribution --- p.100 / Chapter A1.2 --- Definition and Properties of Erfc(x) --- p.101 / Chapter A1.3 --- The Variable of Erfc in Eq. 315 --- p.104 / Chapter A1.4 --- Difference of Peak Position and t0 --- p.105 / Chapter A2. --- LASER HEATING EFFECTS IN THE LIGHT SCATTERING EXPERIMENT --- p.106 / Chapter A 2.1 --- Introduction --- p.106 / Chapter A 2.2 --- Experimental Technique --- p.106 / Chapter A 2.3 --- Results and Discussion --- p.108 / Chapter A 2.4 --- Summary --- p.109 / REFERENCES --- p.113

Typescript (photocopy) / ix, 240 leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / Thesis (Ph.D.)--University of Adelaide, Dept. of Mechanical Engineering, 1978

Four buoyant plumes were produced within a laboratory convectively mixed layer from a source height of about z[subscript s] = 0.15 h, where h is the height of the convectively mixed layer. The projected images of these plumes in the X-Z plane were analyzed using a densitometer (photomultiplier tube) to calculate dimensionless crosswind integrated concentration values. These values were examined at regular intervals of non-dimensionalized heights and downwind distances to calculate center-of-mass heights, approximate plume limits, and touchdown distances. The plume buoyancy values were expressed in dimensionless terms as the parameter F[subscript *]. The touchdown distances are greatest and the surface integrated crosswind concentrations are smallest for the three most buoyant plumes. The highest center-of-mass and plume limit positions are also associated with the most buoyant plumes. The surface crosswind integrated concentration values for even the least buoyant plumes are much smaller than for non-buoyant plumes from previous studies. Touchdown distances for buoyant plumes from this data set agree with data from Willis and Deardorff (1983); however, the centerline and lower plume limits are at greater heights for this study. Vertical profiles of crosswind integrated concentration values indicate that the least buoyant plume has a bimodal distribution near the stack then becomes uniform at greater distances. The vertical profiles for the three most buoyant plumes show the highest concentration values are present in the upper part of the mixed layer at most downwind distances examined in this study. This distribution of effluent is also indicated by the vertical center-of- mass heights being larger than the plume centerline calculated from the average of the lower and upper plume limits. / Graduation date: 1985

Thesis--Ph. D., University of Hong Kong, 1978. / Also availalbe in microfilm.

Thesis (Ph. D.)--Lehigh University, 2003. / Includes vita. Includes bibliographical references (leaves 120-126).

No description available.

No description available.

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Thesis (M.S.)--Virginia Polytechnic Institute, 1966. / Vita. Abstract. Includes bibliographical references (leaves 23-24). Also available via the Internet.

Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Two computer disks in pocket of volume. Includes bibliographical references (leaves 119-127). Also available via the Internet.