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Numerical Simulations and Tracer Studies as a Tool to Support Water Circulation Modeling in Breeding Reservoirs

Zima P.

Archives of Hydro-Engineering and Environmental Mechanics

2014

Vol. 61, nr 3-4

217–-229

The article presents a proposal of a method for computer-aided design and analysis of breeding reservoirs in zoos and aquariums. The method applied involves the use of computer simulations of water circulation in breeding pools. A mathematical model of a pool was developed, and a tracer study was carried out. A simplified model of two-dimensional flow in the form of a biharmonic equation for the stream function (converted into components of the velocity vector) was adopted to describe the flow field. This equation, supplemented by appropriate boundary conditions, was solved numerically by the finite difference method. Next, a tracer migration equation was solved, which was a two-dimensional advection-dispersion equation describing the unsteady transport of a non-active, permanent solute. In order to obtain a proper solution, a tracer study (with rhodamine WT as a tracer) was conducted in situ. The results of these measurements were compared with numerical solutions obtained. The results of numerical simulations made it possible to reconstruct water circulation in the breading pool and to identify still water zones, where water circulation was impeded.

Modelowanie kinematyki mobilnego robota transportowego

Stania M., Stetter R., Posiadała B.

Zeszyty Naukowe Instytutu Pojazdów / Politechnika Warszawska

2011

z. 4/85

73--84

W pracy przedstawiono zagadnienie modelowania kinematyki ruchu autonomicznego pojazdu transportowego skonstruowanego na Uczelni Hochschule Ravensburg-Weingarten. W pracy sformułowano i rozwiązano zagadnienie proste jak i odwrotne kinematyki 8-kołowego autonomicznego pojazdu transportowego oraz przedstawiono przykładowe wyniki symulacyjne reprezentujące zmiany poszczególnych parametrów ruchu. W modelu kinematyki uwzględniono zjawisko kontaktu pomiędzy podłożem a kołem napędowym. Przy rozwiązywaniu zadania odwrotnej kinematyki założono tor ruchu oraz prędkość wybranego punktu należącego do platformy. Model prosty kinematyki został opracowany w celu zweryfikowania poprawności opracowanego modelu kinematyki. Przedstawione wyniki symulacyjne wykazują zgodność opracowanych modeli kinematyki badanego obiektu. Opracowane modele pozwalają na prowadzenie analiz ruchu obiektu poprzez badania symulacyjne na podstawie zaproponowanego modelu obliczeniowego.

Modeling problem connected with the autonomous transport vehicle designed at Hochschule Ravensburg-Weingarten has been presented in the paper. The forward and inverse kinematics problem of eight-wheeled autonomous transport vehicle have been formulated and solved as well as the example simulation results representing the changes of individual motion parameters have been showed. Contact phenomenon between foundation and drive wheel has been taken into account in the kinematics model. Motion trajectory and velocity of the selected point belonging to the platform have been intended during the inverse kinematics problem has been solved. The forward kinematics problem has been worked out in order to do verification of correctness of studied kinematics model. The presented simulation results point out compatibility the worked out kinematics model of investigated object. The worked out models allow carrying out analysis of object motion through simulation investigations on the basis of proposed computational model.