Instytut Budownictwa Wodnego
Polskiej Akademii Nauk

Essay #8581 details

ATTRIBUTEVALUE
typeC
database id8581
title
authors
affiliations
year2015
seriesArchives of Hydro-Engineering and Environmental Mechanics
issueVol. 62, No. 1-2
publisherWydawnictwo IBW PAN
placeGdańsk
attributes[published] [reviewed] [scientific] [international reach]
languageen

Parts

ATTRIBUTEVALUE
typeA
database id8588
titleWave-induced sediment motion beyond the surf zone: case study of Lubiatowo (Poland)
authorsCerkowniak G., Ostrowski R., Stella M.
pages27 — 39
full text linkhttp://www.ibwpan.gda.pl/storage/app/media/ahem/ahem62str027.pdf
keywordscross-shore seabed profile, offshore wave climate, wave transformation, nearbed flow velocities, bed shear stresses, sediment motion, depth of closure
affiliations
  1. Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mails: grcerkowniak@ibwpan.gda.pl, rafal.o@ibwpan.gda.pl, m.stella@ibwpan.gda.pl
tasksZ 2.2.2/2015
abstractsThe paper presents results of field and theoretical investigations of a natural sandy shore located near the IBW PAN Coastal Research Station in Lubiatowo (Poland, the south Baltic Sea). The study site displays multi-bar cross-shore profiles that intensively dissipate wave energy, mostly by breaking. The main field data comprise offshore wave parameters and three cross-shore bathymetric profiles. Waveinduced nearbed velocities and bed shear stresses are theoretically modelled for weak, moderate, strong and extreme storm conditions to determine sediment motion regimes at various locations on the seaward boundary of the surf zone. The paper contains a discussion on the depth of closure concept, according to which the offshore range of sea bottom changes can be determined by the extreme seasonal deep-water wave parameters.
attributes[reviewed] [scientific]
languageen
points14
ATTRIBUTEVALUE
typeA
database id8587
titleNonlinear interactions between gravity waves in water of constant depth
authorsSzmidt J. K., Hedzielski B.
pages3 — 25
full text linkhttp://www.ibwpan.gda.pl/storage/app/media/ahem/ahem62str003.pdf
keywordsnonlinear water wave, wave interaction, material variables, potential solution
affiliations
  1. Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mail: jks@ibwpan.gda.pl
abstractsThe paper deals with interactions between water waves propagating in fluid of constant depth. In formulation of this problem, a nonlinear character of these interactions is taken into account. In particular, in order to simplify a solution to nonlinear boundary conditions at the free surface, a system of material coordinates is employed as independent variables in the description of the phenomenon. The main attention is focused on the transient solutions corresponding to fluid motion starting from rest. With respect to the initial value problem considered, we confine our attention to a finite fluid domain. For a finite elapse of time, measured from the starting point, the solution in a finite fluid area mimics a solution within an infinite domain, inherent for wave propagation problems. Because of the complicated structure of equations describing nonlinear waves, an approximate formulation is considered, which is based on a power series expansion of dependent variables with respect to a small parameter. Such a solution is assumed to be accurate in describing the main features of the phenomenon. Numerical experiments are conducted to illustrate the approximate formulation developed in this paper.
attributes[reviewed] [scientific]
languageen
points14
ATTRIBUTEVALUE
typeA
database id8589
titleModel of pressure distribution in vortex flow controls
authorsMielczarek S., Sawicki J.
pages41 — 52
full text linkhttp://www.ibwpan.gda.pl/storage/app/media/ahem/ahem62str041.pdf
keywordsrotational flow, flow controls, vortex valve, storm waste water
affiliations
  1. Gdańsk University of Technology, Faculty of Civil and Environmental Engineering, ul. G. Narutowicza 11/12, 80-233 Gdańsk, Poland, e-mail: jsaw@pg.gda.pl
abstractsVortex valves belong to the category of hydrodynamic flow controls. They are important and theoretically interesting devices, so complex from hydraulic point of view, that probably for this reason none rational concept of their operation has been proposed so far. In consequence, functioning of vortex valves is described by CFD-methods (computer-aided simulation of technical objects) or by means of simple empirical relations (using discharge coefficient or hydraulic loss coefficient). Such rational model of the considered device is proposed in the paper. It has a simple algebraic form, but is well grounded physically. The basic quantitative relationship, which describes the valve operation, i.e. dependence between the flow discharge and the circumferential pressure head, caused by the rotation, has been verified empirically. Conformity between calculated and measured parameters of the device allows for acceptation of the proposed concept.
attributes[reviewed] [scientific]
languageen
ATTRIBUTEVALUE
typeA
database id8446
titleLiquefaction resistance of a granular soil containing some admixtures of fines
authorsSawicki A., Mierczyński J., Mikos A., Sławińska J.
pages53 — 65
notesKopia w oprac. Tp4386, Tp4425
full text linkhttp://www.ibwpan.gda.pl/storage/app/media/ahem/ahem62str053.pdf
keywordsliquefaction, admixtures of silt, triaxial investigations
affiliations
  1. Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mails: as@ibwpan.gda.pl, mier@ibwpan.gda.pl, amikos@ibwpan.gda.pl, stynaju@ibwpan.gda.pl
abstractsThe paper deals with the mechanics of sand with some admixtures of fines. The basic question is whether such admixtures are liquefiable or not. Experimental results show that admixtures of fines do not essentially influence the liquefaction susceptibility of granular soils. The original experimental investigations support this conclusion.
attributes[reviewed] [scientific]
languageen
points6

Kontakt:

  ul. Kościerska 7, 80–328 Gdańsk, POLSKA

   (+48)58-552-3903, fax (+48)58-552-4211

  sekr@ibwpan.gda.pl

Copyright © 2018, IBW PAN w Gdańsku