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Matematické modely hydraulických systémů, příklady, analýza
Straškraba, Ivan
The purpose of this contribution is to describe some phenomena arising in hydraulic systems. By a hydraulic system we call a network of tubes, pumps, valves, accumulators and other elements designed to fulfil certain function, for example pumping water from one tank to another. To quantify the fluid flow through the system in question we use fundamental physical principles, namely conservation of mass, momentum and energy. In pipes it leads to Navier-Stokes equations simplified with regard to the special properties of the flow. For description of the fluid flow through other hydraulic elements different models are used which must be identified by the help of experiments performed on an appropriately designed test ring.
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Theory and Praxis of Mathematical Modelling of Hydrodynamical Processes
Straškraba, Ivan
Mechanics of fluids is a part of continuum mechanics. Its subject is a macroscopic description of fluid motion. Other points of view are possible as statistical fluid mechanics approach or kinetic approach which is most respecting the corpuscular character of the matter. On macroscopic scale, the last approach does not seem to be practical because of the huge number of objects (molecules) to be described and of course a great number of (e.g. initial) data to be specified. In this survey we are not going....
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