| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 8470 |
| title | The dilation and modelling of sands in the light of experimental data |
| authors | Sawicki A. |
| pages | 3 — 15 |
| notes | Kopia w oprac. Tp4392 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem61str003.pdf |
| keywords | sands, dilation, constitutive equations |
| affiliations | - Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mail: as@ibwpan.gda.pl
|
| abstracts | The problem of dilation is discussed in the context of classical Cam-Clay model, which was
developed on the basis of a specific assumption regarding the plastic work. This assumption
leads to a special form of the dilation function, from which a shape of yield function is derived.
The above mentioned assumption is compared with the results of the triaxial tests, performed
on the model "Skarpa" sand. It is shown that the Cam-Clay approach is not realistic, as it is
based on the assumption which is not consistent with experimental data. Some general
considerations and discussion of this problem are also presented. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 14 |
| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 8128 |
| title | Modeling of water flows around a circular cylinder with the SPH method |
| authors | Szmidt K., Hedzielski B. |
| pages | 39 — 60 |
| notes | Maszynopis w oprac. Tp 4344 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem61str039.pdf |
| keywords | transient water wave, SPH modeling, boundary conditions, approximation of shear forces |
| affiliations | - Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mail: jks@ibwpan.gda.pl, ben@ibwpan.gda.pl
|
| abstracts | The paper describes the SPH modeling of a plane problem of fluid flow around a rigid circular
cylinder. In the model considered, the cylinder is placed in a rectangular fluid domain at
a certain distance from a horizontal plane boundary, and it is subjected to fluid flow forces.
The fluid motion is induced by a piston type generator. The generator - fluid system starts to
move from rest at a certain moment of time. The work aims at a discrete description of the fluid
flow around the cylinder and, at the same time, calculation of the pressure distribution along
the circumference of the cylinder and the resultant of the pressure on the cylinder. In order to
solve the initial value problem considered, a new SPH formulation of boundary conditions on
the cylinder surface is proposed which match the physical condition for the fluid velocity at
this boundary. For a viscous fluid, an approximate description of the stress tensor is formulated
which allows to reduce the differentiation of field functions to the first order in calculating the
shear forces in the SPH approach. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 14 |
| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 8130 |
| title | Incompressible SPH method for simulating violent free-surface flows |
| authors | Staroszczyk R. |
| pages | 61 — 83 |
| notes | Maszynopis w oprac. Tp4343 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem61str061.pdf |
| keywords | gravity water wave, free-surface, incompressible flow, Lagrangian description, smoothed particle hydrodynamics |
| affiliations | - Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mail: rstar@ibwpan.gda.pl
|
| abstracts | In this paper the problem of transient gravitational wave propagation in a viscous incompressible
fluid is considered, with a focus on flows with fast-moving free surfaces. The governing
equations of the problem are solved by the smoothed particle hydrodynamics method (SPH).
In order to impose the incompressibility constraint on the fluid motion, the so-called projection
method is applied in which the discrete SPH equations are integrated in time by using
a fractional-step technique. Numerical performance of the proposed model has been assessed
by comparing its results with experimental data and with results obtained by a standard (weakly
compressible) version of the SPH approach. For this purpose, a plane dam-break flow problem
is simulated, in order to investigate the formation and propagation of a wave generated by
a sudden collapse of a water column initially contained in a rectangular tank, as well as the
impact of such a wave on a rigid vertical wall. The results of simulations show the evolution
of the free surface of water, the variation of velocity and pressure fields in the fluid, and the
time history of pressures exerted by an impacting wave on a wall. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 14 |
| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 8433 |
| title | Condition of sea shores and methods of their protection in the south-east Baltic coastal area |
| authors | Ostrowski R., Pruszak Z., Babakov A. |
| pages | 17 — 37 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem61str017.pdf |
| keywords | South-Eastern Baltic coast, dynamics of cliffs and beach/dune shores, anthropogenic impacts, shore protection against erosion |
| affiliations | - Institute of Hydro-Engineering, Polish Academy of Sciences, ul. Kościerska 7, 80-328 Gdańsk, Poland, e-mail: rafal.o@ibwpan.gda.pl, zbig@ibwpan.gda.pl
- Institute of Oceanology of the Russian Academy of Sciences, Atlantic Branch in Kaliningrad (AB IO RAS), Prospect Mira 1, 236000 Kaliningrad, Russia, e-mail: babakov_temp@mail.ru
|
| abstracts | The paper describes lithodynamic and morphodynamic processes occurring in the main part
of the south-eastern Baltic coastal area, namely on the sea shores from the Vistula mouth in
the Gulf of Gdańsk to the Lithuanian-Latvian border. The study area is subject to intensive
natural coastal changes, as well as shore evolution caused by anthropogenic impacts at several
locations. Methods of coastal protection against erosion and shore stabilization systems applied
in the past and currently are described. The paper deals with the causes of the dynamics of
beach/dune shores and cliffs. It presents the authors’ field observations of 2010–2013, as well
as previously gained knowledge and the results of Polish, Russian and joint Polish-Russian
field surveys. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 14 |