Bubble population phenomena in acoustic cavitation

Numerical simulation of heat transfer and fluid flow past a rotating isothermal cylinder – A LBM approach

http://people.ku.edu/~z190z415/publications/ijhff2008.pdf

Study of heat-transfer on the surface of a circular cylinder in flow using an immersed-boundary method

Part I: Approximate Solutions Analytical Methods for the Estimation of Heat Transfer from Nonisothermal Walls Basic Equations Self-Similar Solutions of the Boundary Layer Equations Solutions of the Boundary Layer Equations in the Power Series Integral Methods Method of Superposition Solutions of the Boundary Layer Equations in the Series of Shape Parameters Approximate Solutions of Conjugate Problems in Convective Heat Transfer Formulation of a Conjugate Problem of Convective Heat Transfer The Case of Linear Velocity Distribution across the Thermal Boundary Layer The Case of Uniform Velocity Distribution across the Thermal Boundary Layer (Slug Flow) Solutions of the Conjugate Convective Heat Transfer Problems in the Power Series Solutions of the Conjugate Heat Transfer Problems by Integral Methods Part II: Theory and Methods Heat Transfer from Arbitrary Nonisothermal Surfaces in a Laminar Flow The Exact Solution of the Thermal Boundary Layer Equation for an Arbitrary Surface Temperature Distribution Generalization for an Arbitrary Velocity Gradient in a Free Stream Flow General Form of the Influence Function of the Unheated Zone: Convergence of the Series The Exact Solution of the Thermal Boundary Layer Equation for an Arbitrary Surface Heat Flux Distribution Temperature Distribution on an Adiabatic Surface in an Impingent Flow The Exact Solution of an Unsteady Thermal Boundary Layer Equation for Arbitrary Surface Temperature Distribution The Exact Solution of a Thermal Boundary Layer Equation for a Surface with Arbitrary Temperature in a Compressible Flow The Exact Solution of a Thermal Boundary Layer Equation for a Moving Continuous Surface with Arbitrary Temperature Distribution The Other Solution of a Thermal Boundary Layer Equation for an Arbitrary Surface Temperature Distribution Heat Transfer from Arbitrary Nonisothermal Surfaces in Turbulent Flow Basis Relations for the Equilibrium Boundary Layer Solution of the Thermal Turbulent Boundary Layer Equation for an Arbitrary Surface Temperature Distribution Intensity of Heat Transfer from an Isothermal Surface: Comparison with Experimental Data The Effect of the Turbulent Prandtl Number on Heat Transfer on Flat Plates Coefficients gk of Heat Flux Series for Nonisothermal Surfaces Approximate Relations for Heat Flux in a Transition Regime General Properties of Nonisothermal and Conjugate Heat Transfer The Effect of Temperature Head Distribution on Heat Transfer Intensity Gradient Analogy and Reynolds Analogy Heat Flux Inversion Zero Heat Transfer Surfaces Examples of Optimizing Heat Transfer in Flow over Bodies Analytical Methods for Solving Conjugate Convective Heat Transfer Problems A Biot Number as a Criterion of the Conjugate Heat Transfer Rate General Boundary Condition for Convective Heat Transfer Problems: Errors Caused by Boundary Condition of the Third Kind Reduction of a Conjugate Convective Heat Transfer Problem to an Equivalent Heat Conduction Problem Temperature Singularities on the Solid-Fluid Interface Universal Functions for Solving Conjugate Heat Transfer Problems - Solution Examples Reducing the Unsteady Conjugate Convective Heat Transfer Problem to an Equivalent Heat Conduction Problem Integral Transforms and Similar Methods Solutions in Asymptotic Series in Eigenfunctions Superposition and Other Methods Green's Function and the Method of Perturbation Numerical Methods for Solving Conjugate Convective Heat Transfer Problems Analytical and Numerical Methods Approximate Analytical and Numerical Methods for Solving Differential Equations Difficulties in Computing Convection-Diffusion and Flow Numerical Methods of Conjugation Examples of Numerical Studies of the Conjugate Convective Heat Transfer in Pipes and Channels Examples of Numerical Studies of the Conjugate Convective Heat Transfer in Flows around and inside Bodies Part III: Applications Thermal Treatment of Materials Moving Materials Undergoing Thermal Processing Simulation of Industrial Processes Drying of Continuous Moving Materials Technological Processes Multiphase and Phase-Change Processes Drying and Food Processing Manufacturing Equipment Operation Heat Exchangers and Finned Surfaces Cooling Systems Conclusion

Conjugate Problems in Convective Heat Transfer

A review of conjugate convective heat transfer problems solved during the early and current time of development of this modern approach is presented. The discussion is based on analytical solutions of selected typical relatively simple conjugate problems including steady-state and transient processes, thermal material treatment, and heat and mass transfer in drying. This brief survey is accompanied by the list of almost two hundred publications considering application of different more and less complex analytical and numerical conjugate models for simulating technology processes and industrial devices from aerospace systems to food production. The references are combined in the groups of works studying similar problems so that each of the groups corresponds to one of selected analytical solutions considered in detail. Such structure of review gives the reader the understanding of early and current situation in conjugate convective heat transfer modeling and makes possible to use the information presented as an introduction to this area on the one hand, and to find more complicated publications of interest on the other hand.

/pdf/conjugate-problems-in-convective-heat-transfer-review-2wneto4os4.pdf

Conjugate Problems in Convective Heat Transfer: Review

Numerical simulation was carried out to clarify three-dimensional air motion in the swirl chamber of a diesel engine. Simulations have been performed spherical swirl chambers with different sorts of connecting ports. The results obtained are as follows. (1)Toward the end of the compression stroke, the swirling flow becomes strong. On the other hand, the flow normal to the swirling surface becomes comparatively weak. (2)According to the jet of a subconnecting port, the swirling flow in the end stage of the compression stroke becomes weak in the central part. (3)The spatial distribution of strong turbulent intensities corresponds to the strong flow field and the shear force field based on inlet flow.

Numerical simulation of air motion in the swirl chamber of a diesel engine. Effect of connecting port in air motion.

Thermal Boundary Condition Effects on Forced Convection Heat Transfer. Application of a Numerical Solution of an Adjoint Problem.

In this paper, we discuss a method for designing an air damper composed of a piston and a cylinder. When we design an air damper, we usually attend to obtain heavy damping. The amount of damping in the air damper, however, is limited by the compressibility of air. In an incompressible fluid damper such as the oil damper, the damping would increase with an increase in the length of the piston and a decrease in the clearance between the piston and the cylinder. In the air damper, the maximum damping is achived at a finite piston length and clearance Infinite length of the piston and zero clearance produce no damping, because the air does not flow through the clearance. This paper presents a simple expression for calculation of the optimum piston length and clearance. The optimum design conditions of the air damper are tested on a vibratory model. The experiments showed that the present expression is useful for designing air dampers.

Method for Designing an Air Damper.

Local details of the influence of horizontal vibrations on heat transfer from a horizontal cylinder have been investigated numerically. In the present work, a stable and efficient numerical scheme in the frequency domain is proposed and applied to the above mentioned problem. As a result, the following facts have been revealed: (1) The local characteristics of heat transfer from a vibrating cylinder are different between the low-frequency vibration and the high-frequency ones, although the convection fields, except in the vicinity of the cylinder surface, show similar features. This is related to the thickness of the inner steady vortex system caused by the vibrating cylinder. (2) For low-frequency vibration, the local heat-transfer rate depends on the inner vortex flow because of the thick vortex system. (3) For high-frequency vibration, the inner vortex system becomes thin and acts like a solid film; hence the local heat-transfer rate depends on the outer vortex flow.

Kazunari Momose

Papers

Numerical simulation of air motion in the swirl chamber of a diesel engine. Effect of connecting port in air motion.

Thermal Boundary Condition Effects on Forced Convection Heat Transfer. Application of a Numerical Solution of an Adjoint Problem.

Method for Designing an Air Damper.

Local characteristics of heat transfer from a vibrating cylinder

Identification of Heat-Source Using Neural Network