Abstract
With the use of the schlieren visualization and echo sounding method, the spatial structure of disturbances in front of a plate and behind it is investigated for the first time in the flow regime of intense internal-wave generation. In the echograms, fine structures are detected both in the upstream disturbances and in the wake within the solid-motion layer. In the schlieren graph, the fields of upstream disturbances are smooth, and thin interfaces are expressed in the confluent wake. Local peaks in the spatial disturbance spectra are expressed on scales that slightly exceed the length of internal waves, and, to a lesser extent, for lower scales. The thinnest interfaces are observed in the schlieren image of the wake immediately behind the plate.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
REFERENCES
G. Shlikhting, Theory of Boundary Layer (Nauka, Moscow, 1969) [in Russian].
L. D. Landau and E. M. Lifshits, Hydrodynamics (Nauka, Moscow, 1986) [in Russian].
E. N. Bondarev, V. T. Dubasov, Yu. A. Ryzhov, S. B. Svirshchevskii, and N. V. Semenchikov, Aerohydromechanics (Mashinostroenie, Moscow, 1993) [in Russian].
K. Basnet and G. Constantinescu, Physics of Fluids29 (11), 115101 (2017).
J. Turner, Buoyancy Effects in Fluids (Cambridge University, Cambridge, 1973).
Yu. D. Chashechkin and V. V. Mitkin, Dokl. Phys. 45 (8), 430 (2000).
Yu. D. Chashechkin, Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 1, 3 (1989).
Yu. D. Chashechkin and V. V. Mitkin, J. Visualization 5 (2), 120 (2002).
R. E. Hanson, H. P. Buckley, and P. Lavoie, Exp. Fluids 53 (4), 863 (2012).
K. Basnet and G. Constantinescu, Phys. Rev. Fluids 4, 044604 (2019).
H. Houcine, Yu. D. Chashechkin, Ph. Fraunie, et al., Int. J. for Numerical Methods in Fluids 68, 451 (2012).
Yu. D. Chashechkin and I. V. Zagumennyi, Int. J. Comput. Meth. Exp. Meas. 8 (2), 148 (2020).
V. E. Prokhorov and Yu. D. Chashechkin, Dokl. Phys. 58 (2), 68 (2013).
Yu. D. Chashechkin, Math. Model Nat. Phenoma 13 (2), 1 (2018).
http://www.ipmnet.ru/uniqequip/gfk/#equip.
Funding
This work was conducted as the subject of a State Task, project no. AAAA-A18-118011990267-5. The experiments were supported in part by the Russian Foundation for Basic Research, project no. 18-05-00870. The calculations were performed at the Scientific and Research Center of Moscow State University with the support of the Program of the Presidium of the Russian Academy of Sciences I.2.49 “Interaction of Physical, Chemical, and Biological Processes in the World Ocean,” project no. AAAA-A17-117121120015-8.
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated by V. Bukhanov
Rights and permissions
About this article
Cite this article
Chashechkin, Y.D., Prokhorov, V.E. Visualization and Echo Sounding of Stratified Fluid Disturbances in Front of and Behind a Vertical Plate. Dokl. Phys. 65, 178–182 (2020). https://doi.org/10.1134/S1028335820040047
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1028335820040047