Wyniki wyszukiwania - BazTech

1

Whirling System of Water Exchange in Breeding Pools

Matej K., Pawliczka I., Sawicki J. M., Wielgat P., Zima P.

Archives of Hydro-Engineering and Environmental Mechanics

|

2016

|

Vol. 63, nr 4

253--263

EN

To create proper living conditions for sea mammals kept in closed systems, one has to make sure that the characteristics of breeding pools, such as their shape, dimensions, the facing of the walls and bottom, as well as the quality and motion of water, resemble as closely as possible the natural environment of the animals. An appropriate system of water exchange plays a very important role here. A complete exchange of water is time-consuming, expensive and troublesome, so it can be performed only periodically and should be supported by a supplementary continuous exchange. This operation improves water quality and can create a proper velocity field in breeding pools. The breeding pools investigated in the present study are located in a sealarium in Hel (Poland), which belongs to the Institute of Oceanography of the Gdansk University. Tracer measurements, carried out in these reservoirs made it possible to evaluate the intensity of continuous water exchange. It was found that this intensity was insufficient (as evidenced by large dead zones in the pools and short detention time), and therefore alterations to the existing system were proposed (i.e. a tangential position of the inlet and a centrally situated outlet). On the basis of a simplified model of circulative water flow, it was shown that the altered hydraulic system can considerably improve the situation.

2

Model cyrkulacji wody w zbiorniku hodowlanym na przykładzie basenów hodowlanych dla fok

Wielgat P., Zima P., Sawicki J., Pawliczka I.

Inżynieria Morska i Geotechnika

|

2014

|

nr 5

342--437

PL

Wyniki symulacji komputerowych cyrkulacji wody w basenach hodowlanych zlokalizowanych w fokarium Stacji Morskiej Instytutu Oceanografii Uniwersytetu Gdańskiego w Helu. Model matematyczny trzech głównych basenów z uwzględnieniem ich zasilania i odpływu wody. Uproszczony model dwuwymiarowego przepływu. Pomiary in situ rozkładu prędkości w charakterystycznych punktach obiektu. Odtworzenie cyrkulacji wody w basenach fokarium oraz identyfikacja stref zastoiskowych, w których cyrkulacja wody jest utrudniona.

EN

The results of computer simulations of water circulation in the breeding polls located in seal facility in the Hel Marine Station of the Institute of Oceanography at the University of Gdańsk. The mathematical model of the three major pools with respect to their inlets and outlets of water. The simplified model of two-dimensional flow. Measurements of the velocity distribution in the characteristic points of the object taken in situ. The reconstruction of water circulation in seal facility pools and identification of isolated still water body zones where water circulation is impeded.

3

Velocity Field Characteristics at the Inlet to a Pipe Culvert

Kolerski T., Wielgat P.

Archives of Hydro-Engineering and Environmental Mechanics

|

2014

|

Vol. 61, nr 3-4

127–-140

EN

A poorly designed culvert inlet structure causes scouring, which can lead to the collapse of the culvert and significant damage to the neighboring land. A set of laboratory tests was evaluated to examine velocity distribution at the culvert inlet. A three-dimensional acoustic Doppler velocimeter was used to measure instantaneous flow velocity upstream of the culvert. The analysis of mean velocities, turbulence strength, and Reynolds stresses was performed to understand the flow structure near the culvert entrance.