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Flows through channels and tubes with step-changing cross-section, including a channel with built-in orifice, were analysed based on the literature survey. The compiled material allowed us to observe some regularities, ;howed difficulties occurring during their analysis and made it possible to prepare our own research programme. Many authors refer to such axially symmetrical constrictions as an orifice...
The impact of the gas density difference on formation of flow patterns of fluids of different density was analysed. Physical modelling of a non-isothermal laminar flow of a gas mixture in a vertical epitaxial reactor chamber was carried out and the model flow was visualised. Visualisation studies, performed using a smoke method, confirmed that the stability of a gas interface determines the flow pattern...
In this paper, the results of theoretical studies on the unsteady liquid flow in a pipe with an element causing the occurrence of recirculation zones are presented. The model of unsteady flow in a pipe with a constriction has been developed. Starting from the principle of momentum conservation referred to a control volume, the differential equation of the flow has been obtained. From this equation,...
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