| ATTRIBUTE | VALUE |
|---|---|
| type | C |
| database id | 3838 |
| title | |
| authors | |
| affiliations | |
| year | 2001 |
| series | Archives of Hydro-Engineering and Environmental Mechanics |
| issue | Vol. 48, No. 1 |
| publisher | Wydawnictwo IBW PAN |
| place | Gdańsk |
| attributes | [published] [reviewed] [scientific] [international reach] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 4420 |
| title | Hydraulic investigation of venturi flumes |
| authors | Jerzy M. Sawicki |
| pages | 115 — 130 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem48no1str115.pdf |
| affiliations | |
| abstracts | Venturi flume is a very popular measuring device. A particularly attractive version of such a device is a standing-wave-flume, as this enables determination of liquid discharge by one-point depth measurement only. However, it is necessary to underline, that some essential simplifications must be introduced into the theoretical description of this case. The paper contains the results of the control investigations of six existing Venturi flumes, installed in three functioning sewage-disposal-plants in Poland. It was shown, that some important mistakes can be committed, when somebody plans such a flume. These mistakes worsen the flow measurement accuracy. In conclusion it was stated that the standing-wave-flume must be designed very carefully, with the use of gradually-varied flow equations. An alternative, which is worth using, is a Venturi flume with two-point depth measurement. |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3840 |
| title | Initial boundary value problems for the vortex motion of an ideal fluid bounded domains |
| authors | Szmidt J. K. |
| pages | 19 — 34 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem48no1str019.pdf |
| affiliations | |
| abstracts | The paper deals with the problem of vortex motion of an incompressible perfect fluid in bounded domains. The research is confined to chosen cases of steady velocity fields within rectangular, circular and elliptic regions with rigid boundaries. The solution to the initial-value problem of the fluid flow for the assumed velocity fields is the primary object of this paper. It is demonstrated that individual particles of the fluid have their own periods of motion and thus, one should be careful in describing such problems by means of discrete methods, especially in the Lagrangian variables. The problem discussed has its origin in numerical analysis of water waves by means of the finite difference or the finite element method. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 4408 |
| title | Local scour in non-uniform bed material below a horizontal solid apron |
| authors | Paweł Zawadzki, Ryszard Błażejewski |
| pages | 3 — 17 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem48no1str003.pdf |
| affiliations | |
| abstracts | A two-dimensional mathematical model of local scour in non-uniform non-cohesive soil below a horizontal solid apron is presented. The model parameters were identified on the basis of own experimental laboratory data. Verification of the model, accomplished using other laboratory data, showed fairly good conformity, however, additional verification under field conditions is needed. |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 4409 |
| title | Two-dimensional shallow water model for rapidly and gradually varied flow |
| authors | Michał Szydłowski |
| pages | 35 — 61 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem48no1str035.pdf |
| affiliations | |
| abstracts | The numerical solution of full shallow water equation (SWE) including the eddy viscosity terms is presented. In the first part of the paper the solution of the homogeneous part of SWE for discontinuous, rapidly varied flow is reported. The method presented here is based on Roe idea of numerical fluxes of mass and momentum. The numerical solution of SWE on unstructured, triangular mesh is reported and the influence of geometry approximation is examined. The imposing of the boundary condition on a triangular numerical mesh is described in detail. The consistent with finite volume method (FVM) approximation of the viscous part of SWE is presented. The procedure similar to the finite element method (FEM) is used to calculate the function derivatives inside the finite volumes. The specific difficulties of source terms numerical integration are studied and some methods to avoid these problems are presented. To integrate the bottom friction term the splitting technique is implemented. The computed results are compared to analytical solution of Saint-Venant equations, experimental data and results available in the literature. Good agreement between these results is observed. |
| attributes | [reviewed] [scientific] |
| language | en |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 3839 |
| title | Mechanical properties of sea ice and their constitutive description |
| authors | Staroszczyk R. |
| pages | 63 — 95 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem48no1str065.pdf |
| affiliations | |
| abstracts | Constitutive relations for sea ice are reviewed in the paper. Both the continuum (ductile) and fracture (brittle) ranges of ice behaviour are considered. Microscopic properties and mechanisms occurring at the ice grain level are discussed in the context of the types of macroscopic deformation observed in laboratory tests. A group of relatively simple viscoelastic models of the Burgers type for the ductile behaviour of isotropic ice is presented, followed by an account of more general and complex, three-dimensional models capable of describing the rheology of transversely isotropic or orthotropically anisotropic fabric of columnar ice. The tensile and compressive brittle fracture of ice due to the formation and propagation of cracks in the material is next discussed, and relations for determining failure strength of ice and relevant constitutive theories are provided. |
| attributes | [reviewed] [scientific] |
| language | en |
| points | 6 |
| ATTRIBUTE | VALUE |
|---|---|
| type | A |
| database id | 4412 |
| title | Dimensionless equation for side-channel weirs |
| authors | Andrzej Kotowski |
| pages | 97 — 113 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem48no1str097.pdf |
| affiliations | |
| abstracts | Using the principle of conservation of momentum, an analysis of the one-dimensional description of flows of Newtonian fluids in prismatic channels with side weirs was carried out. A new form of the equation of motion - with a corrected mass decrement term and added momentum-variation term - has been derived from the principle of conservation of momentum. Following examination of relevant coefficients, the dimensionless form of the modified applies, to the hydraulic design of a side weir with a high overfall crest and a throttling pipe, used in sewer systems. |
| attributes | [reviewed] [scientific] |
| language | en |