Computer-Aided Design of a Cleanroom Ceiling Plenum System with a Limited Space for HVAC Equipment

1999 ◽  
Vol 42 (6) ◽  
pp. 34-39 ◽  
Author(s):  
Ting-Kwo Lei ◽  
Andrew Manning ◽  
Felix Kersting
Keyword(s):  
Flow Field ◽  
Computational Fluid Dynamic ◽  
Computer Aided Design ◽  
Fluid Dynamic ◽  
Flow Distribution ◽  
Velocity Fields ◽  
Computer Aided ◽  
Distribution Uniformity ◽  
Aided Design ◽  
Number Of Cells

Acommercial Computational Fluid Dynamic (CFD) software program was used to analyze the flow field inside a cleanroom ceiling plenum. The design required restricted space for the HVAC equipment. The effect of the number of cells used in the computational model on the simulation output was investigated. Pressure and velocity fields were examined. A comparison of flow distribution uniformity between a reference ceiling plenum system and a ceiling plenum system containing more ducted air supplies was made. An analysis of the effect of diffusion plates was conducted.

A Reduced‐Fluid Dynamic Discharge Model for Applications in Technology‐Oriented Computer‐Aided Design

1996 ◽  
Vol 143 (6) ◽  
pp. 1940-1944
Author(s):  
R. P. Brinkmann ◽  
R. Fürst ◽  
Chr. Werner ◽  
Matthias Hierlemann
Keyword(s):  
Computer Aided Design ◽  
Fluid Dynamic ◽  
Computer Aided ◽  
Discharge Model ◽  
Aided Design ◽  
Dynamic Discharge

A NUMERICAL SIMULATION INVESTIGATION OF THE HYDRODYNAMIC MOTIONS OF A SHIP ADVANCING IN WAVES

2021 ◽  
Vol 156 (A4) ◽  
Author(s):  
D C Lo ◽  
D T Su ◽  
J T Lin
Keyword(s):  
Computer Aided Design ◽  
Degrees Of Freedom ◽  
Fluid Dynamic ◽  
Wave Interaction ◽  
Six Degrees Of Freedom ◽  
Ship Model ◽  
Computer Aided ◽  
Cad Tool ◽  
Aided Design ◽  
Wave Incidence

This study establishes a relationship diagram of the ship-wave interaction under a ship advancing in waves. A finite difference method based on volume of fluid (VOF) principles was used to simulate the hydrodynamic motions of a ship advancing in waves. A ship model was constructed using a computer aided design (CAD) tool. The computational fluid dynamic (CFD) technique was used to calculate the hydrodynamic motions effect of a ship sailing in waves at varying angles of incidence. This study investigates a number of significant related parameters, such as the speed of the ship model, the various wave incidence angles, the wave height, and the navigation time. A chart is also used to show the flow field, and changes in the six degrees of freedom motion and continually compare changes in the drag force.

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