Three-dimensional numerical study of submerged spatial hydraulic jumps

Title:

Three-dimensional numerical study of submerged spatial hydraulic jumps

Creator:

Foda, Ahmed S., Imam, Yehya E., Bazaraa, Abd Allah S. , and Imam, Emad H.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:14ed6756-04bb-45c6-b754-d279d3f3299f
uuid:14ed6756-04bb-45c6-b754-d279d3f3299f
doi:10.2478/johh-2020-0021

Subject:

abrupt channel expansion, submerged spatial hydraulic jump, asymmetric jump, oscillatory jump, and computational fluid dynamics

Type:

model:article and TEXT

Format:

počítač and online zdroj

Description:

A three-dimensional numerical model was applied to simulate submerged spatial hydraulic jumps (SSHJ) downstream of a symmetric vent that discharges into a wider channel. Simulations were carried out for different aspect ratios of the vent, expansion ratios of vent width to downstream channel width, tailwater depth, and inlet Froude number. Depending on these factors, simulations indicated the formation of steady asymmetric SSHJ, oscillatory asymmetric SSHJ, and steady symmetric SSHJ, consistent with results of previous experimental studies. The model reproduced observed depth downstream of vent, jump length, and velocity profiles along channel centerline for steady symmetric SSHJ. For oscillatory asymmetric SSHJ, simulated oscillation frequencies had Strouhal numbers that varied with expansion ratio and ranged between 0.003 and 0.015. With piers downstream of the vent, oscillatory SSHJ continued to exhibit jet deflections when pier length was relatively short (≲0.2 of jump length) but became steady asymmetric for longer piers.

Language:

Slovak

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Coverage:

211-222

Source:

Journal of hydrology and hydromechanics | 2020 Volume:68 | Number:3

Harvested from:

CDK

Metadata only:

false