TAILIEUCHUNG - Ebook Holman heat transfer (10th edition): Part 2

(BQ) Part 2 book "Holman heat transfer" has contents: Natural convection systems, radiation heat transfer, condensation and boiling heat transfer, heat exchangers, mass transfer, mass transfer. | hol29362_Ch07 11/3/2008 15:0 C H A P T E R 7 7-1 Natural Convection Systems INTRODUCTION Our previous discussions of convection heat transfer have considered only the calculation of forced-convection systems where the fluid is forced by or through the heat-transfer surface. Natural, or free, convection is observed as a result of the motion of the fluid due to density changes arising from the heating process. A hot radiator used for heating a room is one example of a practical device that transfers heat by free convection. The movement of the fluid in free convection, whether it is a gas or a liquid, results from the buoyancy forces imposed on the fluid when its density in the proximity of the heat-transfer surface is decreased as a result of the heating process. The buoyancy forces would not be present if the fluid were not acted upon by some external force field such as gravity, although gravity is not the only type of force field that can produce the free-convection currents; a fluid enclosed in a rotating machine is acted upon by a centrifugal force field, and thus could experience free-convection currents if one or more of the surfaces in contact with the fluid were heated. The buoyancy forces that give rise to the free-convection currents are called body forces. 7-2 FREE-CONVECTION HEAT TRANSFER ON A VERTICAL FLAT PLATE Consider the vertical flat plate shown in Figure 7-1. When the plate is heated, a freeconvection boundary layer is formed, as shown. The velocity profile in this boundary layer is quite unlike the velocity profile in a forced-convection boundary layer. At the wall the velocity is zero because of the no-slip condition; it increases to some maximum value and then decreases to zero at the edge of the boundary layer since the “free-stream” conditions are at rest in the free-convection system. The initial boundary-layer development is laminar; but at some distance from the leading edge, depending on the fluid properties and the temperature difference .

• Cơ khí - Chế tạo máy
• Holman heat transfer
• Natural convection systems
• Radiation heat transfer
• Condensation and boiling heat transfer
• Heat exchangers
• Mass transfer
• Mass transfer
• Steady State conduction—one dimension
• Steady state conduction
• Multiple dimensions
• Unsteady state conduction
• Lecture Mass transfer
• Mass transfer operations
• Mass concentration
• Mass fraction
• Humidification operations
• Equation of continuity
• Mass transfer coefficients
• Fundamentals of heat
• Internal flow
• Free convection
• Radiation process
• Radiation exchange between surfaces
• Diffusion mass transfer
• Fundamentals of Heat and Mass transfer
• Boiling and condensation
• Heat transfer
• Vacuum frying
• Potato chips
• Khoai tây chiên
• Công nghệ thực phẩm
• Fundementals of heat
• Mass transfer kotandaraman
• An overview of heat transfer
• Conduction with heat generation
• Two dimensional steady heat conduction
• Chemical engineering
• The boundary layer
• Heat and mass transfer
• Humidification and water cooling
• John H
• Lienhard IV
• Lienhard V
• thermal resistance
• Forced convection
• Natural convection
• Phase change processes—boiling
• Condensation freezing and melting
• Introduction to conduction
• One dimensional steady state conduction
• Two dimensional steady state conduction
• Transient conduction
• Introduction to convection
• Journal of Mechanics
• On the problem of heat
• Mass transfer in thermal non isolated reservoir
• Thermal non isolated reservoir
• The possible thermal exchange
• Reservoir with surrounding medium
• Đề cương môn học
• Quá trình và thiết bị truyền khối
• Thiết bị truyền khối
• Mass transfer process and equipments
• Thiết bị truyền khối điển hình
• Radiation of MHD visco elastic fluid flow over
• Chemical reaction on heat of MHD visco elastic
• Mass transfer of MHD visco elastic fluid flow
• Exponentially stretching sheet through porous medium
• Chromatography A
• Preparative chromatography
• Antibody purification
• Pore diffusion
• Solid diffusion
• Vertical plate
• Magnetic field
• Variable viscosity
• Gas turbines
• Gas cooled nuclear reactors
• Master's thesis
• Master's thesis of Engineering
• Solid liquid mixing
• Solids suspension
• High solids concentration mixing
• High solids loading
• Mass transfer experiments
• The heat load during in vessel retention of core melt
• Obstructing the rising flow
• Volumetric Heat Source
• Facility height of only 0
• 1 m
• Mass flow rate
• Thermal efficiency
• Solar air heater
• Thermal performance
• Longitudinal fins
• Eulerian Frames
• Mass Conservation
• Conservation of Momentum
• Conservation of Energy
• Multicomponent Mixtures
• Vietnam Journal of Science and Technology
• Bài viết khoa học
• Tạp chí Khoa học Công nghệ Việt Nam
• Pore size distribution
• Control volume method
• The finite element method
• Practical considerations in modeling
• Plane stress–strain analysis
• Heat transfer and mass transport
• Structural dynamics
• Time dependent heat transfer
• BMC Bioinformatics
• Mass spectrometry
• Quality control
• Posterior error probability
• Local false discovery rate
• Transfer learning
• Historical Buildings
• Transport Properties
• Hygroscopic Wheels
• Porous Materials
• Suspended Particles
• Micro System Cooling
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