Numerical Study of Shock Waves Propagating in a Rectangular Elbow. Effects of Area Reduction and Rounded Corner.

Based on the hydrodynamic coefficients obtained in a series of experiment on a full-scale net panel, numerical simulation is conducted to study the interaction between flow and the flexible net in waves and current. Finite element model was constructed and modified Morison Equation was adopted to estimate the deformation of the net sheet. The deformation of the net sheet was investigated quantitatively by estimating the minimum projected area and comparing the area reduction ratio under each test case. Furthermore, the relationship between the net’s area reduction ratio and the nondimensionalized parameters in the model testing, including the structure’s Reynolds number, KC number, frequency parameter and reduced velocity was discussed.

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Numerical study of non-equilibrium gas flows with shock waves by using the Navier–Stokes equations in the two-temperature approximation

10.1063/1.4964076 ◽

2016 ◽

Cited By ~ 3

Author(s):

Georgy Shoev ◽

Yevgeniy Bondar

Keyword(s):

Shock Waves ◽

Stokes Equations ◽

Numerical Study ◽

Navier Stokes ◽

Gas Flows ◽

Navier Stokes Equations ◽

Two Temperature ◽

Non Equilibrium

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NUMERICAL STUDY OF THE STATE OF SOIL DAMS AS A RESULT OF IMPACT OF SHOCK WAVES AND UNSTEADY LOADS

Prirodoobustrojstvo ◽

10.26897/1997-6011-2021-3-55-62 ◽

2021 ◽

pp. 55-62

Author(s):

E. V. ANDREEV ◽

Keyword(s):

Shock Waves ◽

Numerical Study ◽

Pressure Head ◽

Operational Reliability ◽

Hydraulic Structures ◽

Time Interval ◽

Short Time Interval ◽

Urgent Task ◽

Temperature Dependences ◽

The Impact

At the stage of the life cycle, ensuring the operational reliability and safety of pressure head hydraulic structures is an urgent task. One of the serious threats at the present stage is the destruction of hydraulic structures by the impact of non-stationary loads, by directed explosions in the immediate vicinity of the structures or on their surface. Shock waves pose a serious threat to hydraulic structures. Impulse short-term impact on the solid surfaces of hydraulic structures or on the aquatic environment characterizes the specifi cs of the problem under consideration, as the nonstationary of the process of motion of continuous media into which, in a short time interval, a volume of energy can be released that can deform or completely destroy them. Scenarios of this kind can occur either in the immediate vicinity of a hydraulic structure or as a result of the collision of solid bodies on its surface. Water upstream of the hydro technical structure and its body is a complex liquid because many of its characteristics differ significantly in size from similar characteristics of other liquids or have so-called anomalies on pressure and temperature dependences.

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