Hydrodynamics of Tight Rigid Nodeless Structures
https://doi.org/10.37663/0131-6184-2023-3-96-102
Abstract
Rigid netting structures are elements, parts of commercial fishing gear and aquaculture cages. They serve to enclose or filter hydrobionts, they are engineering structures. Rigid netting structures can be used as inserts in commercial fishing gear, as well as selective gratings and elements that prevent hydraulic backwater in trawls. They are also elements of stationary fishing gear, such as winders or other fishing gear or barriers. In aquaculture cages, rigid netting structures, the elements of which have a sufficiently large value of the longitudinal and transverse modulus of elasticity E, are parts that ensure the strength of the netting structures. Mesh rigid structures are made of plastic or aluminum rods in the form of cylinders, which can be either smooth or twisted. The article considers the application of a numerical method for determining the hydrodynamic characteristics of mesh rigid structures using the software developed by the authors. A schematization of a rigid netting structure, a mathematical model based on Navier-Stokes partial differential equations, a computational domain, initial and boundary conditions are proposed. The calculation was carried out on a regular computational grid using an implicit finite-difference scheme using the methods of coordinate-wise splitting, linearization of nonlinear equations with subsequent correction of nonlinear coefficients, and solution of the obtained tridiagonal systems by the sweep method. The results of numerical experiments are presented in the form of visualization of pressure on the surface of various mesh structures at various angles of attack.
About the Authors
A. A. Nedostup
Kaliningrad State Technical University (KSTU)
Russian Federation
Russian Federation
Alexander A. Nedostup – Candidate of Technical Sciences, Associate Professor, Head of the Department of Industrial Fisheries
1 Sovetsky Prospekt, Kaliningrad, 236022
A. O. Razhev
Kaliningrad State Technical University (KSTU)
Russian Federation
Russian Federation
Alexey O. Razhev – Candidate of Technical Sciences, Leading researcher
1 Sovetsky Prospekt, Kaliningrad, 236022
P. V. Nasenkov
Kaliningrad State Technical University (KSTU)
Russian Federation
Russian Federation
Pavel V. Nasenkov – junior researcher
1 Sovetsky Prospekt, Kaliningrad, 236022
E. I. Sergeev
Kaliningrad State Technical University (KSTU)
Russian Federation
Russian Federation
Egor I. Sergeyev – graduate student of the Department of Industrial Fisheries
1 Sovetsky Prospekt, Kaliningrad, 236022
I. S. Belozer
Kaliningrad State Technical University (KSTU)
Russian Federation
Russian Federation
Ivan S. Belozer – Master's student of the Department of Industrial Fisheries
1 Sovetsky Prospekt, Kaliningrad, 236022
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Review
For citations:
Nedostup A.A., Razhev A.O., Nasenkov P.V., Sergeev E.I., Belozer I.S. Hydrodynamics of Tight Rigid Nodeless Structures. Fisheries. 2023;(3):96-102. (In Russ.) https://doi.org/10.37663/0131-6184-2023-3-96-102
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