| ATTRIBUTE | VALUE |
|---|---|
| type | C |
| database id | 8468 |
| title | |
| authors | |
| affiliations | |
| year | 2013 |
| series | Archives of Hydro-Engineering and Environmental Mechanics |
| issue | Vol. 60, No. 1-4 |
| publisher | Wydawnictwo IBW PAN |
| place | Gdańsk |
| attributes | [published] [reviewed] [scientific] [international reach] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 8469 |
| title | 60 lat Instytutu Budownictwa Wodnego PAN w Gdańsku |
| authors | Sawicki A. |
| pages | 3 — 30 |
| notes | Kopia w oprac. Tp4392 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem60str003.pdf |
| affiliations | |
| attributes | [reviewed] |
| language | pl |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 8558 |
| title | Lagrangian model for a single saltating grain in the near-wall region of an open-channel flow |
| authors | Czernuszenko W. |
| pages | 31 — 50 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem60str031.pdf |
| keywords | Lagrangian model, open-channel flow, particle-particle interaction |
| affiliations | |
| abstracts | A mathematical model for the continuous saltation of a particle near the granular bed in an open-channel flow is developed in detail. The model is based on the Lagrangian equations governing particle motion, and it takes into account the following forces: drag, lift, gravitation, virtual mass and the force responsible for particle-particle interactions. A model of particle-particle collisions is developed and used to determine the mean impulsive force acting upon a particle flowing and rebounding from the channel bed. The model can simulate the continuous saltation trajectories of a single particle in the near-bed region of turbulent flows, in which particle motion is controlled by collisions. The model has been calibrated and verified with available published data in a rather wide range of grain sizes from 0.53 mm to 15 mm. All parameters, such as lift, drag, restitution, friction coefficients and roughness height, have been set on the basis of a reanalysis of these published data. |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 8559 |
| title | Lax-Wendroff and McCormack schemes for numerical simulation of unsteady gradually and rapidly varied open channel flow |
| authors | Machalińska-Murawska J., Szydłowski M. |
| pages | 51 — 62 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem60str051.pdf |
| keywords | open channel flow, mathematical modeling, numerical simulation, FDM schemes |
| affiliations | |
| abstracts | Two explicit schemes of the finite difference method are presented and analyzed in the paper. The applicability of the Lax-Wendroff and McCormack schemes for modeling unsteady rapidly and gradually varied open channel flow is investigated. For simulation of the transcritical flow the original and improved McCormack scheme is used. The schemes are used for numerical solution of one dimensional Saint-Venant equations describing free surface water flow. Two numerical simulations of flow with different hydraulic characteristics were performed – the first one for the extreme flow of the dam-break type and the second one for the simplified flood wave propagation problem. The computational results are compared to each other and to arbitrary solutions. |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 8560 |
| title | On the SPH approximations in modeling water waves |
| authors | Szmidt K. |
| pages | 63 — 86 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem60str063.pdf |
| keywords | water wave, SPH modeling, consistency, kernel correction |
| affiliations | |
| abstracts | This paper presents an examination of approximation aspects of the Smoothed Particle Hydrodynamics (SPH) in modeling the water wave phenomenon. Close attention is paid on consistency of the SPH formulation and its relation with a correction technique applied to improve the method accuracy. The considerations are confined to flow fields within finite domains with a free surface and fixed solid boundaries with free slip boundary conditions. In spite of a wide application of the SPH method in fluid mechanics, the appropriate modeling of the boundaries is still not clear. For solid straight line boundaries, a natural way is to use additional (virtual, ghost) particles outside the boundary and take into account mirror reflection of associated field variables. Such a method leads to good results, except for a vicinity of solid horizontal bottoms where, because of the SPH approximations in the description of pressure, a stratification of the fluid material particles may occur. In order to illustrate the last phenomenon, some numerical tests have been made. These numerical experiments show that the solid fluid bottom attracts the material particles and thus, to prevent these particles from penetration into the bottom, a mutual exchange of positions of real and ghost particles has been used in a computation procedure. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 8561 |
| title | Application of an element-free Galerkin method to water wave propagation problems |
| authors | Staroszczyk R. |
| pages | 87 — 105 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem60str087.pdf |
| keywords | gravity water wave, transient problem, element-free Galerkin method |
| affiliations | |
| abstracts | The paper is concerned with the problem of gravitational wave propagation in water of variable depth. The problem is solved numerically by applying an element-free Galerkin method. First, the proposed model is validated by comparing its predictions with experimental data for the plane flow in water of uniform depth. Then, as illustrations, results of numerical simulations performed for plane gravity waves propagating through a region with a sloping bed are presented. These results show the evolution of the free-surface elevation, displaying progressive steepening of the wave over the sloping bed, followed by its attenuation in a region of uniform depth. In addition, some of the results of the present model are compared with those obtained earlier by using the conventional finite element method. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |