An Algorithm for Attenuation of Turbulence in Particulate Flow Linked to the Fluid-dynamic Code COMMIX-M
スポンサーリンク
概要
- 論文の詳細を見る
Fluid turbulence is affected by the presence of transported particles in a variety of engineering problems. In particulate flow large particles increase the turbulence intensity while small particles damp it. Numerical simulation of turbulence due to vortex shedding by large particles is made satisfactorily by adding corrective terms in the k-ε model equations. Damping of turbulence due to the shear action of small particles which are entrained by the oscillating motion of the fluid is however more difficult to simulate. This article applies the method proposed by Al Taweel and Landau for turbulence attenuation due to small particles which consists of evaluating a damping function depending on the spectral distribution of turbulence. The method, originally applied in the dissipation range only, is extrapolated to the full spectrum of turbulence and the resulting numerical algorithm is linked to the general purpose computer program COMMIX-M which describes three dimensional multi-phase fluid-dynamic problems. An analytical treatment is presented, which generalizes the Al Taweel-Landau method to the inertial subrange of the spectral domain. Numerical calculations of particulate flow in upward pipe flow, with particles transported by air, are discussed. Comparison with experimental results enables to infer about future work necessary to cope with present limitations of the method proposed.
- 社団法人 日本原子力学会の論文
- 1998-02-25
著者
-
Ninokata Hisashi
Research Lab. For Nuclear Reactors Tokyo Institute Of Technology
-
Bottoni Maurizio
Research Laboratory For Nuclear Reactors Tokyo Institute Of Technology
関連論文
- Numerical Studies on Dynamic Behavior of Air-Water Cross Flow Between Two Circular Interconnected Channels
- Study of the Self-Controllability for the Fast Reactor Core with High-Thermal-Conductivity Fuel
- Computational Fluid Dynamics Study of Liquid Droplet Impingement Erosion in the Inner Wall of a Bent Pipe
- PRA-Based SMA : the First Tool toward a Risk-Informed Approach to the Seismic Design of the IRIS
- Prediction of Release Rate of Burnt Sodium as Aerosol
- Analysis of an Out-of-pile Experiment for Materials Redistribution under Core Disruptive Accident Condition of Fast Breeder Reactors
- Prediction of the Equilibrium Two-Phase Flow Distributions in Inter-Connected Subchannel Systems
- Concept of Erbium Doped Uranium Oxide Fuel Cycle in Light Water Reactors
- Second International Symposium on Global Environment and Nuclear Energy Systems
- Numerical Method for Simulation of Fluid Flow and Heat Transfer in Geometrically Disturbed Rod Bundles
- Numerical Study on Observed Decay Ratio of Coupled Neutronic-Thermal Hydraulic Instability in Ringhals Unit 1 under Random Noise Excitation
- An Algorithm for Attenuation of Turbulence in Particulate Flow Linked to the Fluid-dynamic Code COMMIX-M
- Development of Parallel Coupling System between Three-Dimensional Nodal Kinetic Code ENTREE and Two-Fluid Plant Simulator TRAC/BF1
- The Multi-Fluid Multi-Phase Subchannel Analysis Code KAMUI for Subassembly Accident Analysis of an LMFR
- Nonlinear Iterative Nodal Method Applied to Neutron Flux Modal Analysis