Development of Quasi-Three Dimensional Turbulence Model for Film Cooling on Flat Plate

1993 ◽  
Author(s):  
Joo Sung Maeng ◽  
Jong Shin Lee
Keyword(s):  
Turbulence Model ◽  
Film Cooling ◽  
Three Dimensional ◽  
Heat Fluxes ◽  
Coordinate Systems ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Flat Plates ◽  
Finite Analytic Method ◽  
Simpler Algorithm

The present paper describes predictions of Full Coverage Film Cooling. The calculations have been performed by a quasi-three dimensional model that account for the basically three dimensional nature of the flow. The quasi-three dimensional model are solved by finite analytic method, modified simpler algorithm and body fitted coordinate systems. The turbulent stresses and heat fluxes are obtained from the low Reynolds K-ε turbulence model. The results are given for flows over flat plates for different injection angles, relative spacings, blowing rates and injection temperatures.

Analysis of plunging phenomenon in dam reservoirs using three-dimensional density flow simulations

2008 ◽  
Vol 35 (10) ◽  
pp. 1138-1151 ◽  
Author(s):  
Fatih Üneş
Keyword(s):  
Turbulence Model ◽  
Coriolis Force ◽  
Present Model ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Dam Reservoir ◽  
Reservoir Flow ◽  
Dam Reservoirs ◽  
Density Flow

Density flow is investigated in a three-dimensional model through a dam reservoir with diverging and sloping bottom channels. When an inflow of higher density enters ambient dam reservoir water, it plunges below the ambient water and becomes density underflow. In the present model, nonlinear and unsteady continuity, momentum, energy, and turbulence model equations are formulated in the Cartesian coordinates. The k–ε turbulence model is used with an extension to include production or destruction of turbulent kinetic energy. To investigate the Coriolis force effect on the density flow in a dam reservoir, a Coriolis force parameter is included in the governing equations. The equations of the model are solved based on the initial and boundary conditions of the dam reservoir flow for a range of bottom slopes and divergence angles. In this paper, variation in density flow parameters, such as velocity, temperature, and turbulence viscosity through the dam reservoir, is investigated. Moreover, mixing rate, plunging points, and plunging depths are determined from the simulation results. The results of the present model are compared with the previous experimental work and model. The present model results follow the expected basic trend. The three-dimensional model simulation and analysis improve the understanding of density flow, underflow, divergence flow, mass transport, and dam–reservoir flow interaction.

Three-Dimensional Model for Virtual Surgical Simulation, during Complex Skull Base Surgery and Aneurysm Surgery

Skull Base ◽  
2008 ◽  
Vol 18 (S 01) ◽  
Author(s):  
Akio Morita ◽  
Toshikazu Kimura ◽  
Shigeo Sora ◽  
Kengo Nishimura ◽  
Hisayuki Sugiyama ◽  
...  
Keyword(s):  
Skull Base ◽  
Surgical Simulation ◽  
Skull Base Surgery ◽  
Three Dimensional ◽  
Aneurysm Surgery ◽  
Dimensional Model ◽  
Three Dimensional Model

A Variant Group Assignment Three Dimensional Model Using Pattern Recognition Technique

2019 ◽  
Vol 10 (6) ◽  
pp. 1382-1394
Author(s):  
R. Vijayalakshmi ◽  
V. K. Soma Sekhar Srinivas ◽  
E. Manjoolatha ◽  
G. Rajeswari ◽  
M. Sundaramurthy
Keyword(s):  
Pattern Recognition ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Pattern Recognition Technique ◽  
Group Assignment ◽  
Recognition Technique

Technology of creating of the unified three-dimensional model of a real estate object

2018 ◽  
Vol 62 (6) ◽  
pp. 659-662
Author(s):  
Korchagina O.A. ◽  
◽  
Trang Nguyen Thuy ◽  
Tevkina A.V. ◽  
◽  
...  
Keyword(s):  
Real Estate ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model
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