Theoretical analysis of turbulent flow and heat transfer around a surface-mounted obstacle.
スポンサーリンク
概要
- 論文の詳細を見る
To estimate the distribution of turbulent eddy viscosity in the flow related to complicated geometries, a simple model was developed based on the mixing-length hypothesis. This model was applied to two cases of turbulent separated flows around a surface-mounted obstacle of circular cross section. The first case is film flow on the outer wall of a vertical tube, and the second is flow between parallel plates. Calculations were performed by using the Galerkin finite-element method. In view of heat transfer augmentation, the structure of the separating and reattaching flow around a surface-mounted obstacle was investigated in detail, together with the corresponding temperature field.<BR>It was shown that the reattachment distance depends on the Reynolds number; the isotherm contours are strongly distorted and pushed down toward the wall due to the back flow in the recirculating zone; the maximum Nusselt number occurs on the upstream side of the reattachment point; and the augmentation effect due to the obstacle is remarkable only in a limited turbulent range of relatively low Reynolds number.
- The Society of Chemical Engineers, Japanの論文
著者
-
HIRAOKA Setsuro
Department of Applied Chemistry, Nagoya Institute of Technology
-
Yamada Ikuho
Department Of Applied Chemistry Nagoya Insitute Of Technology
-
Aragaki Tsutomu
Department of Appfied Chemistry, Nagoya Institute of Technology
-
Iwata Shuichi
Department of Appfied Chemistry, Nagoya Institute of Technology
-
Tange Hideto
Department of Applied Chemistry, Nagoya Institute of Technology
-
Kawaizumi Fumio
Institute for Molecular Science
関連論文
- PHASE EQUILIBRIA AND SIMULATION METHOD FOR HETEROGENEOUS AZEOTROPIC DISTILLATION
- Calculation of Three-Phase Flash and Partial Condensation for Ternary Systems
- A Method of Calculating Multistage Liquid-Liquid Extraction for Ternary Systems
- Solid-Liquid Mass Transfer in Gas-Liquid-Solid Agitated Vessel
- Low-Frequency Fluctuations in Agitated Vessels
- Simplified Heat and Mass Transfer Model for Distillation Column Simulation
- Total Reflux Simulation of Packed Column Distillation
- PACKED COLUMN DISTILLATION SIMULATION WITH A RATE-BASED METHOD
- THERMODYNAMIC FACTORS DERIVED FROM GROUP CONTRIBUTION ACTIVITY COEFFICIENT MODELS
- Singular Finite Elements for the Die-Swell Simulation of Viscoelastic Fluids
- Practical Correlation of Excess Molar Volumes of Binary, Ternary and Quaternary Mixtures of Water, Methanol, Ethanol and 1-Propanol by an NRTL-Type Equation
- Application of a Singular/Decoupled Finite Element Method to the Viscoelastic Die-swell Flow Simulation
- NUMERICAL ANALYSIS OF TURBULENT FLOW AND HEAT TRANSFER IN PARALLEL PLATES ATTACHED WITH TURBULENCE PROMOTERS AT REGULAR INTERVALS ON LOWER SURFACE
- Transport Phenomena around Cylindrical Baffles in an Agitated Vessel Measured by an Electrochemical Method
- Effects of Liquid Film Formed on Flask Surface on Oxygen Transfer Rate in Shaking Flask and Development of Baffled Shaking Vessel by Optical Method Based on Sulfite Oxidation
- Mixing Performances of a New Mixing Equipment with Vibratory Fins
- Model Analysis of Mixing Time Correlation in an Agitated Vessel with Paddle Impeller
- A MODIFIED BROYDEN-HOUSEHOLDER ALGORITHM FOR SOLVING MULTICOMPONENT DISTILLATION PROBLEMS
- Estimation of Heat Transfer Coefficient from Universal Expression of Tangential Velocity at Boundary Layer Edge on Side Wall of a Fully Turbulent Agitated Vessel
- Estimation of Boundary Layer Thickness at Side Wall of a Fully Turbulent Agitated Vessel without Baffles
- Universal Expression of Tangential Velocity Distribution near Side Wall of a Fully Turbulent Agitated Vessel without Baffles
- Estimation of Tangential Velocity near Side Wall of Fully Turbulent Agitated Vessel without Baffles
- Performance of a Shaking Vessel-Type Bioreactor with a Current Pole
- IMPROVEMENT OF PARTICLE DISPERSION IN A SHAKING VESSEL WITH CURRENT POLE
- Effect of mixing condition of additives on the solidification of green body by gelcasting method
- GAS-LIQUID TURBULENT TWO PHASE FLOW ALONG VERTICAL FLAT PLATE WITH GAS EVOLUTION
- A STAGEWISE ALGORITHM FOR MULTICOMPONENT MULTISTAGE BATCH DISTILLATION CALCULATION
- Power Consumption and Gas-Liquid Mass Transfer Volumetric Coefficient in an Agitated Vessel with Pitched Wire-Gauze Blade Impeller under Aeration
- Correlation of Discharge Flow Rate in a Vessel with Pitched Blade Paddle Impeller
- Rapid Electroconcentration in a Tube of 25-40 Microliters under a Relatively Low Applied Voltage
- Enhanced Anthocyanin Production from Grape Callus in an Air-Lift Type Bioreactor Using a Viscous Additive-Supplemented Medium
- Mixing Performance of an Agitated Vessel with Bottom Baffles
- Solid-Liquid Mass Transfer and Critical Frequency for Complete Suspension in a Reciprocally Shaking Vessel
- Mixing Performance of a Reciprocally Shaking Vessel
- ACCELERATING CONVERGENCE IN SUCCESSIVE RELAXATION ALGORITHM FOR MULTICOMPONENT DISTILLATION CALCULATION
- Improvement of Mixing Efficiencies of Conventional Impeller with Unsteady Speed in an Impeller Revolution
- VAPORIZATION FROM PURE LIQUID SURFACE IN A CENTRIFUGAL MOLECULAR STILL
- MASS TRANSFER VOLUMETRIC COEFFICIENT AND DROPLET DIAMETER IN LIQUID-LIQUID DISPERSIONS STIRRED WITH A PADDLE IMPELLER WITH WIRE GAUZE
- Power Consumption and Gas - Liquid Mass Transfer Volumetric Coefficient in a Mechanically Agitated Vessel with Wire - Gauze Impeller
- Low-Frequency Fluctuations in Agitated Vessels
- A CONCEPTUAL DESIGN OF LIB FUSION REACTOR : UTLIF (2)
- Motion of Bubbles in Branch Flow Channel Filled with Viscoelastic Fluids under Pressure-Oscillating Field
- Motion of Bubbles in Branched-Flow Channel Filled with Viscoelastic Fluids under Pressure-Oscillating Field
- Distillation calculation by use of conjugated gradient method.
- Simulation of a multieffect solar still and the static characteristics.
- Heat transfer in jet mixing vessel with rotating nozzle around the vessel axis.
- Jet mixing of liquids in a rotating cylindrical vessel.
- Measurement of mass transfer rate from free surface in shaking vessel type bioreactor.
- Jet mixing of liquids with a rotating nozzle around the axis of a cylindrical vessel.
- Generalized relation between liquid pressure and solid compressive pressure in non-unidimensional filter cakes.
- Concentration dependence of diffusivity for the styrene-polystyrene and ethylbenzene-polystyrene systems.
- Combined free and forced laminar convection in thermal entrance region of horizontal triangular ducts.
- The effect of variable viscosity on laminar flow and heat transfer in rectangular ducts.
- Effects of Position and Geometry of Current Pole on Mixing Characteristics in Shaking Vessel
- Production of Regenerated Plantlet using Shaking Vessel-Type Bioreactor.
- Constant pressure filtration of power-law non-newtonian fluids.
- Distillation calculation by multistage relaxation methods.
- APPROXIMATION FOR PREDICTION OF VAPORIZATION PLATE EFFICIENCY
- PREDICTIONS OF CONSTANT PRESSURE AND CONSTANT RATE F1LTRATIONS BASED UPON AN APPROXIMATE CORRECTION FOR SIDE WALL FRICTION IN COMPRESSION PERMEABILITY CELL DATA
- Development of jet mixer with rotating and up-and-down moving nozzles.
- Vaporization of non-ideal binary mixture from liquid surface under vacuum.
- Mutual diffusivity of volatile materials in molten polystyrene.
- Theoretical analysis of turbulent flow and heat transfer around a surface-mounted obstacle.
- Optimum operating condition of Petlyuk's distillation process for ternary separation.
- A method for solving design problem of multicomponent distillation.
- Experimental study on heat transfer of combined free and forced laminar convection in thermal entrance region of horizontal rectangular ducts.
- Combined free and forced laminar convection in triangular ducts.
- Heat transfer under solidification of liquid on agitated vessel wall.
- Constant rate and variable pressure-variable rate filtration of power-law non-newtonian fluids.
- Industrial expression equation for semisolid materials of solid-liquid mixture under constant pressure.
- POROSITY VARIATION IN FILTER CAKE UNDER CONSTANT-PRESSURE FILTRATION
- Numerical analysis of three dimensional velocity profile of highly viscous Newtonian fluid in an agitated vessel with paddle impeller.
- Blocking filtration laws for filtration of power-law non-newtonian fluids.
- Analysis of constant pressure filtration of power-law non-newtonian fluids.
- Sedimentation Potential Measurements and Partial Molar Volumes of Univalent Ions in Water-Acetone Mixtures.
- Visualization of jet flow in a mixing vessel with a nozzle rotating around the vessel axis.
- Heat Transfer Coefficient and Mixing Time in a Cylindrical Mixing Vessel with Axial Jet Nozzles
- Analysis of heat and mass transfer in a centrifugal molecular still.
- NOTE ON ABSORPTION POINT EFFICIENCIES
- LAW OF THE WALL AND VELOCITY DEFECT LAW IN FULLY TURBULENT NON-BAFFLED AGITATED VESSEL
- Numerical method for solving steady three-dimensional heat conduction problem in sector column.
- TRANSPORT PHENOMENA AT THE WALL OF AGITATED VESSELS