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Dr. Goodarz Ahmadi
Director, TMFL
Clarkson U.
Potsdam, NY 13699
315-268-2322
ahmadi@clarkson.edu


 Research Projects
Aerosol Wind Tunnel | Boiler | Charged Fibers | Charged Particles | CMP | CO2 Sequestration | Coal Ash Deposition | CRCD | Cryogenic Surface Cleaning | DNS | Fractured Rocks | Gas Hydrates | Glass Furnaces | Hot Gas Filtration | Indoor Air | Lung | Nano Aerosols | Outdoor Air | Particle Resuspension | Powder Dispersion | Bauxite Residue | Sediment Transport | Slurry Reactors | Sprays | Supersonic Impactors | Vibration Control | Reduced Order Modeling |

Reduced order modeling

First mode of axial and normal velocities.

Second mode of axial and normal velocities.

The numerical simulation of the Navier-Stokes Equations (NSE) requires enormous computational resources. Even with the improvements in the speed of computers, it is still basically impossible to solve most practical flow problems accurately and even more difficult to do this in real time. The main difficulty is the large number of degrees of freedom needed to resolve all of the flow features. In order to obtain real-time solutions, which are often needed for flow control problems, one solution is reduced order modeling (ROM). The idea of reduced order modeling is to perform detailed, time consuming simulations ahead of time, then use this information to generate a predictive and fast model which can be used for real-time prediction of the response of a system to some time varying input. Among the various ROM techniques, here we examine proper orthogonal decomposition (POD) based reduced order modeling. Reduced-order modeling (ROM) of steady and transient fluid flows using the proper orthogonal decomposition (POD) is being studied. Particular attention is given to incompressible, unsteady flow over a two-dimensional NACA0015 airfoil. When the flow sheds vortices, constant blowing or transient sinusoidal through a jet is imposed. The study on the three steps of POD reduced order models (Quality and quantity of modes, temporal intervals used to generate modes and developing ROD methods for transient flows) is undergone.

Funded by United States Air Force
-U.S. Department of Energy-

Questions or Comments should be addressed to the Lab Director, Dr. Goodarz Ahmadi

Dr. Goodarz Ahmadi | Turbulence & Multiphase Fluid Flow Laboratory | Department of Mechanical & Aeronautical Engineering
Copyright 2000-2006 Dr. Goodarz Ahmadi. All rights reserved.
Potsdam, New York, 13699
ahmadi@clarkson.edu