| ATTRIBUTE | VALUE |
|---|---|
| type | C |
| database id | 3874 |
| title | |
| authors | |
| affiliations | |
| year | 2003 |
| series | Archives of Hydro-Engineering and Environmental Mechanics |
| issue | Vol. 50, No. 3 |
| publisher | Wydawnictwo IBW PAN |
| place | Gdańsk |
| attributes | [published] [reviewed] [scientific] [international reach] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3883 |
| title | 50 years of the Institute of Hydroengineering in Gdańsk |
| authors | Majewski W. |
| pages | 151 — 154 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str151.pdf |
| affiliations | |
| attributes | |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3884 |
| title | The 50th Volume of Archives of Hydro-engineering and Environmental Mechanics |
| authors | Leśniewska D. |
| pages | 155 — 164 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str155.pdf |
| affiliations | |
| attributes | |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3875 |
| title | Lagrangian-Eulerian approach to modelling of wave transformation and flow velocity in the swash zone and its seaward vicinity |
| authors | Kapiński J. |
| pages | 165 — 192 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str165.pdf |
| affiliations | |
| abstracts | One-dimensional long waves approaching a beach face are investigated herein. In particular, flow velocity distribution, wave profile transformation and extreme positions of a water uprush-backwash are analysed. For simplicity, non-dissipative waves, waves influenced by linear or quadratic bottom friction, as well as bore-like breaking waves are considered separately. Bore formation and propagation in a shoaling water is modelled by geometrical limitation of a local slope of the wave front. Analysed phenomena are described using the shallow-water wave theory, although in this paper application of the model has been restricted to the swash zone and its seaward vicinity. Governing equations are expressed in hybrid Lagrangian-Eulerian co-ordinates. The Lagrangian approach gives a precise mathematical description of both an orbital motion and the moving position of a water tongue on a beach slope. The Eulerian contribution to the model enables easy comparison of results of wave and water motion by method of conducting of measurements. Moreover, the hybrid description affords the possibility of simple prediction of mean water flow caused by propagating waves. The following description also presents results of numerical computations especially concerning wave run-up height, flow and orbital velocities and water surface transformation. For simplified bathymetric conditions some analytical solutions are also presented. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3876 |
| title | The individual properties of the selected types of geosynthetics |
| authors | Kazimierowicz-Frankowska K. |
| pages | 193 — 205 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str193.pdf |
| affiliations | |
| tasks | Z 4.3.1/2003: Rozpoznawanie wpływu warstwy geosyntetyku na zachowanie się nawierzchni drogowej |
| abstracts | The paper presents some experimental test results of the influence of selected parameters (samples shapes, short and long creep and relaxation stages, environmental degenerative processes) on the mechanical properties and behaviour of the geosynthetic materials. The individual impact of the change of the above particular parameters on the materials are investigated and some practical conclusions formulated. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3877 |
| title | Simulation of density dependent transport in groundwater |
| authors | Maciejewski S., Zaradny H. |
| pages | 207 — 218 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str207.pdf |
| affiliations | |
| abstracts | A mathematical model of water flow and transport of chemical substances is presented in the paper. This model takes into account the influence of variable density and viscosity of water caused by variable solute concentration in soil. A solution of the problem of water flow and solute transport was sought using numerical methods. A finite elements method for solution of water flow equation and Monte-Carlo method to simulate solute transport were applied. Advantages of the presented model are illustrated on the example of water flow and salt transport in two dimensional ground profile in the region of Puck Bay. The geology of this profile is taken from Jankowska et al (1994). Obtained results from the proposed model are qualitatively conformable with observations in situ. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3878 |
| title | Determination of roughness coefficient of the underside of ice cover |
| authors | Majewski W. |
| pages | 219 — 228 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str219.pdf |
| affiliations | |
| abstracts | The formation of ice cover in winter on rivers, channels and run-of-reservoirs, changes flow characteristics significantly. Calculations of water surface profiles or discharge along a river reach with ice cover by means of 1–D models, requires detailed values of the roughness coefficients of the river bed and underside of the ice cover. Numerous studies dealing with roughness coefficients of the river bed with free surface flow were carried out in the past, however, very few investigations were performed on the determination of the roughness coefficient of the underside of ice cover. Data of calculations indicate that this coefficient may vary considerably with space and time, depending on the character of the ice cover, flow characteristics and meteorological conditions. In 1–D models roughness coefficient of the bed and of the underside of the ice cover must be combined into one composite roughness coefficient. The paper presents determination of roughness coefficient of the underside of ice cover based on velocity distributions in the Vistula River cross-sections with ice cover. It may be assumed that vertical velocity distribution has a logarithmic character in the regions near the bottom and ice cover. Taking into account this assumption the procedure for the calculation of Darcy-Weisbach friction factor f and Manning roughness coefficient n is proposed, basing on the data of velocity measurements in a given vertical. It was found that roughness coefficient of the underside of the ice cover varies in a much larger range than the bottom roughness coefficient and depends very much on the character of the ice cover. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3879 |
| title | Cam-clay approach to modeling pre-failure behaviour of sand against experimental data |
| authors | Sawicki A. |
| pages | 229 — 249 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str229.pdf |
| affiliations | |
| tasks | Z 4.1.1/2003: Analiza wyznaczonych doświadczalnie deformacji suchego piasku w świetle formalizmu klasycznej plastyczności |
| abstracts | The aim of this paper is to compare pre-failure deformations of sand, obtained from a Cam-clay type elastic-plastic model, with experimental data. The experiments were performed in a modern triaxial apparatus, enabling local measurement of both vertical and lateral strains. The experimental programme is briefly described, then a slightly modified, Cam-clay type, elastic-plastic model of sand is presented. Predictions of this model, for different stress paths, are compared with respective experimental results, then extensive discussion of basic problems connected with elasto-plastic modelling of sand is presented. The aim of the discussion is to display some shortcomings of this type of modelling. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3880 |
| title | Finite element simulations of floating ice - engineering structure interactions |
| authors | Staroszczyk R. |
| pages | 251 — 268 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str251.pdf |
| affiliations | |
| abstracts | In this paper the problem of interaction between a coherent floating ice cover and a rigid engineering structure is considered. It is assumed that the ice cover, of horizontal dimensions considerably larger than the dimensions of the structure, is driven by wind and water current drag forces. During the interaction process of a quasi-static character, ice is assumed to behave as a creeping material, with a rheology described by the viscous fluid flow law. The ice cover is treated as a plate which sustains both bending due to the vertical reaction of the underlying water and the action of horizontal forces, which gives rise to the development of creep buckles in the plate and subsequently leads to the flexural failure of ice. An approximate solution to the problem is constructed by employing the finite element method. The results of numerical simulations illustrate the magnitudes of the forces exerted on the structure and their dependence on the wind direction and the structure geometry. In addition, the ice plate deflection in the vicinity of the structure is illustrated, and the values of the critical time at which the plate starts to fail by creep buckling are determined to show their dependence on the ice thickness, temperature, and type. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3881 |
| title | An approximate solution to the Boussinesq type equations describing periodic waves |
| authors | Szmidt J. K. |
| pages | 269 — 285 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str269.pdf |
| affiliations | |
| tasks | Z 1.3.1/2003: Zbadanie rozwiązania dla długiej fali za pomocą metody skończonych objętości |
| abstracts | The paper concerns the non-linear problem of description of shallow-water waves of finite amplitude. The description is based on the conservation-law formulation, which seems to be particularly convenient in constructing an approximate solution of the problem considered. The analysis is confined to the one-dimensional case of waves propagating in water of constant depth. In the model considered, vertical acceleration of the fluid is taken into account, and thus, the fundamental equations of the problem are similar to those given by Boussinesq (Abbott 1979). The equations differ from those frequently used in shallow-water hydrodynamics which are based on the assumption of hydrostatic pressure. An approximate solution of the problem is constructed by means of a perturbation scheme with the third order expansion of the equations with respect to a small parameter. It is demonstrated that the solution procedure may be successfully applied only within a certain range of the two ratios defining wave height to water depth and the depth to wave length, respectively. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3882 |
| title | Laboratory investigation of deep water waves transformation and stability |
| authors | Wilde P., Sobierajski E., Chybicki W., Sobczak Ł. |
| pages | 287 — 313 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem50str287.pdf |
| affiliations | |
| abstracts | The authors performed laboratory investigations and the analysis of the transformation of deep-water waves in the flume of the Institute of Hydro-Engineering. Special wave trains were generated by our piston-type wavemaker. Due to the transformation the wave profiles changed along the path of propagation. At first, the changes appeared at the ends of the wave train. Far from the generator they intruded into the middle interval of initially regular waves. Finally, the whole wave train consisted of a set of irregular groups. To study the instability problem the wave trains were modulated by superposition of wave groups with very small amplitudes. The number of waves in a group was a very important parameter. When the number was proper, even small amplitudes of modulation resulted in strong development of amplitudes of wave groups. In our theoretical analysis the non-linear Schroedinger equation was used. The comparison of laboratory and theoretical results proved that this equation is useful but it does not describe the phenomenon in the best way. There have been many attempts to construct a numerical procedure that describes the propagation of water waves. Very often the numerical algorithm is not stable and the results of calculation diverge from the expected behaviour. The authors believe that in many cases the instability is due to the physical loss of stability of the wave train and thus it is necessary to have a good understanding of the physics of the studied motion. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |