Title :
Artificial neural network-based modeling and intelligent control of transitional flows
Author :
Sahan, Ridvan A ; Koc-Sahan, N. ; Albin, D.C. ; Liakopoulos, A.
Author_Institution :
Dept. of Mech. Eng., Marmara Univ., Istanbul, Turkey
Abstract :
Empirical eigenfunctions of transitional flow in a grooved channel are extracted by proper orthogonal decomposition (POD). POD is applied to numerical solutions of the governing Navier-Stokes partial differential equations at Reynolds numbers Re=430, 750, 1050 and at Prandtl number Pr=0.71 (air flow). For each value of Re, a low-dimensional set of nonlinear ordinary differential equations is derived by Galerkin projection. The Galerkin projection-based low-order dynamical models are used to generate the data required to efficiently train artificial neural networks in the range 400⩽Re⩽1200. Accurate artificial neural network-based models of the flow system are obtained. The study demonstrates the potential use of Galerkin projection-based and artificial neural network-based low-order models as valuable tools for flow modeling and for prediction of short- and long-term behavior of transitional flow systems. A possible real-time intelligent flow control scheme is briefly discussed
Keywords :
Galerkin method; channel flow; flow control; flow instability; flow separation; intelligent control; nonlinear differential equations; partial differential equations; physics computing; turbulence; Galerkin projection-based low-order dynamical models; Navier-Stokes partial differential equations; artificial neural network-based modeling; eigenfunctions; flow modeling; grooved channel; intelligent control; long-term behavior; nonlinear ordinary differential equations; proper orthogonal decomposition; short-term behavior; transitional flows; Artificial neural networks; Differential equations; Eigenvalues and eigenfunctions; Fault diagnosis; Geometry; Heat transfer; Intelligent control; Partial differential equations; Power system modeling; Predictive models;
Conference_Titel :
Control Applications, 1997., Proceedings of the 1997 IEEE International Conference on
Conference_Location :
Hartford, CT
Print_ISBN :
0-7803-3876-6
DOI :
10.1109/CCA.1997.627577