Proper orthogonal decomposition applied to PIV data for the oblique transition in a Blasius boundary layer

Markus Wiegel; Markus Fischer

doi:10.1117/12.221512

29 September 1995 Proper orthogonal decomposition applied to PIV data for the oblique transition in a Blasius boundary layer

Markus Wiegel, Markus Fischer

Author Affiliations +

Proceedings Volume 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow; (1995) https://doi.org/10.1117/12.221512
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Using experimental data from Particle Image Velocimetry (PIV) measurements, coherent structures of a transitional, spatially developing boundary layer are determined. The coherent structures are calculated utilizing the Proper Orthogonal Decomposition (POD), which is based on an expansion of the flow field variables into so-called Karhunen-Loeve eigenfunctions. To get reproducible flow conditions we excite the flow with controlled disturbances by means of periodic velocity fluctuations. We are able to introduce two- and three- dimensional traveling waves. Therefore it is possible to investigate different transition scenarios. This paper focuses on the oblique transition. Phase locked signals allows to record the flow field at certain instants of time. We can show that PIV is a suitable technique to provide experimental data for POD. The POD shows that already a small number of modes cover most of the energy.

Citation Download Citation

Markus Wiegel and Markus Fischer "Proper orthogonal decomposition applied to PIV data for the oblique transition in a Blasius boundary layer", Proc. SPIE 2546, Optical Techniques in Fluid, Thermal, and Combustion Flow, (29 September 1995); https://doi.org/10.1117/12.221512

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available