Numerical Simulation of Bubble Motion about a Grid Spacer in a Rod Bundle
نویسندگان
چکیده
منابع مشابه
Turbulence Model Evaluation in 5x5 Pwr Rod Bundle Numerical Simulations with a Split Vane Spacer Grid
This work presents results of flow simulations performed with the commercial code CFX 11.0 in a PWR 5x5 rod bundle segment with a split vane spacer grid. The geometrical configuration and flow conditions used in the experimental studies performed by Karoutas were assumed in the simulations. To make the simulation possible with a limited computational capacity and acceptable mesh refinement, the...
متن کاملNumerical Evaluation of Flow through a 5x5 Pwr Rod Bundle: Effect of the Vane Arrangement in a Spacer Grid
Spacer grids along the fuel assembly of Pressurized Water Reactors (PWR) maintain rod bundles arranged in a regular square configuration. The mixing vanes present in the spacer grids promote cross and swirl flow between and within the subchannels, enhancing the heat transfer performance in the grid vicinity, but also causing an adverse increase of the pressure drop in the rod bundle due the con...
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چکیده ندارد.
15 صفحه اولNumerical Simulation of Scaling Effect on Bubble Dynamics in a Turbulent Flow around a Hydrofoil
A Lagrangian-Eulerian numerical scheme for the investigation of bubble motion in turbulent flow is developed. The flow is analyzed in the Eulerian reference frame while the bubble motion is simulated in the Lagrangian one. Finite volume scheme is used, and SIMPLEC algorithm is utilized for the pressure and velocity linkage. The Reynolds stresses are modeled by the RSTM model of Launder. Upwind ...
متن کاملEvaluation of a Numeric Procedure for Flow Simulation of a 5x5 Pwr Rod Bundle with a Mixing Vane Spacer
The fuel assemblies of the Pressurized Water Reactors (PWR) are constituted of rod bundles arranged in a regular square configuration by spacer grids placed along its length. The presence of the spacer grids promote two antagonist effects on the core: a desirable increase of the local heat transfer downstream the grids and an adverse increase of the pressure drop due the constriction on the coo...
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ژورنال
عنوان ژورنال: Journal of Power and Energy Systems
سال: 2009
ISSN: 1881-3062
DOI: 10.1299/jpes.3.393