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1. Computational Fluid Mechanics |
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Numerical simulation of particle-laden free turbulent flow |
The development of a two-way vortex method, which can account for the interaction between the two phases, and its application to free turbulent flow are conducted. The present method simulates the behavior of vortex elements discretizing the flow field and the movement of particle with Lagrange calculation, being equivalent to Lagrange-Lagrange method. The method has been thus far applied to calculate mixing layer, slit-nozzle jet, wake behind cylinder, and flow induced by free falling particles.
The three-dimensional method and a perfect Lagrange-Lagrange method without using computational mesh are being developed.
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Lagrangian calculation of diffusion of matter |
Lagrange method to calculate diffusion of matter in turbulent flow is developed. In the method, the flow field is calculated by a vortex method, while the diffusion field is simulated with a Lagrange calculation analogous to the vortex method.
The interaction between a point-source plume and a circular cylinder is simulated by the method.
The three-dimensional method is investigated to increase the computational accuracy.
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Numerical simulation of gas-liquid two-phase free shear layer by vortx method |
Bubble-laden jet and wake are frequently observed in engineering equipment.
Since vortex methods can calculate single-phase free turbulent flow without any turbulent model, the methods promise to be successfully simulate bubble-laden free turbulent flow.
Vortex method for bubble-laden free turbulent flow is developed.
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Numerical simulation of gas-liquid two-phase flow involving moving body |
In order to analyze gas-liquid two-phase flow involving moving body,
a numerical method which accounts for the moving boundary is needed.
An ALE finite element method based on an incompresible two-fluid model has been presented and it was successfully applied to simulate various two-phase flows involving moving body.
Two-phase flow around a hydrofoil in heaving and pitching motion and flow-induced vibration around a cylinder are calculated by the method.
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2. Flow measurement using Neural Network
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Neural Network, which can simultaneously measure the flow rate for each phase
of gas-liquid two-phase flow,
is constracted.
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uchiyama@info.human.nagoya-u.ac.jp