Honeycomb-generated Reynolds-number-dependent wake turbulence

L.C. Thijs (Corresponding author), Rik A. Dellaert, Sina Tajfirooz, Jos C.H. Zeegers, J.G.M. (Hans) Kuerten (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

5 Citaten (Scopus)
258 Downloads (Pure)

Samenvatting

We present an experimental and numerical study of the flow downstream of honeycomb flow straighteners for a range of Reynolds numbers, covering both laminar and turbulent flow inside the honeycomb cells. We carried out experiments with planar particle image velocimetry (PIV) in a wind tunnel and performed numerical simulations to perform an in-depth investigation of the three-dimensional flow field. The individual channel profiles downstream of the honeycomb gradually develop into one uniform velocity profile. This development corresponds with an increase in the velocity fluctuations which reach a maximum and then start to decay. The position and magnitude of the turbulence intensity peak depend on the Reynolds number. By means of the turbulence kinetic energy (TKE) budget it is shown that the production of TKE is dominated by the shear layers corresponding to the honeycomb walls. The near-field and far-field decay of the turbulence intensity can be described by power laws where we used the position where the production term of the TKE reaches its maximum as the virtual origin.
Originele taal-2Engels
Pagina's (van-tot)535-561
Aantal pagina's27
TijdschriftJournal of Turbulence
Volume22
Nummer van het tijdschrift9
DOI's
StatusGepubliceerd - 1 sep. 2021

Financiering

This work is part of the research program ‘Innovative Magnetic Density Separation for the optimal use of resources and energy’ with project number 14915, which is partly financed by the Netherlands Organization for Scientific Research (NWO). We would like to thank technicians G. W. J. M. Oerlemans and J. M. van der Veen and student P. Simons for their work.

FinanciersFinanciernummer
Nederlandse Organisatie voor Wetenschappelijk Onderzoek

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