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Št. zadetkov: 4
About inverse Laplace transform of a dynamic viscosity function
Kamil Urbanowicz, Anton Bergant, Rafał Grzejda, Michal Stosiak
Izvirni znanstveni članek
Oznake: inverzna Laplaceva transformacija;analitična rešitev;vodni udar;dinamična viskozna funkcija;dinamika tekočin;tok v cevi;Calogero–Ahmedove vrste;inverse Laplace transform;analytical solution;water hammer;dynamic viscosity function;fluid dynamics;pipe flow;Calogero–Ahmed sums;
A dynamic viscosity function plays an important role in water hammer modeling. It is responsible for dispersion and decay of pressure and velocity histories. In this paper, a novel method for inverse Laplace transform of this complicated function being the square root of the ratio of Bessel function ...
Leto: 2022 Vir: Fakulteta za strojništvo (UL FS)
Navier-Stokes solutions for accelerating pipe flow
Kamil Urbanowicz, Anton Bergant, Michal Stosiak, Adam Deptuła, Mykola Karpenko
Pregledni znanstveni članek
Oznake: Navier-Stoksove enačbe;analitične rešitve;pospešujoč tok;cevni tok;kanalski tok;Navier–Stokes equations;analytical solutions;accelerated flow;pipe flow;
This paper reviews analytical solutions for the accelerated flow of an incompressible Newtonian fluid in a pipeline. This problem can be solved in one of two ways according to the (1) imposed pressure gradient or (2) flow rate. Laminar accelerated flow solutions presented in a number of publications ...
Leto: 2023 Vir: Fakulteta za strojništvo (UL FS)
Progress in analytical modeling of water hammer
Kamil Urbanowicz, Haixiao Jing, Anton Bergant, Michal Stosiak, Marek Lubecki
Izvirni znanstveni članek
Oznake: reservoir-horizontal pipeline-valve system;water hammer;transient laminar flow;analytical solution;frictionless system;quasi-steady friction;unsteady skin friction;
Analytical formulas for laminar water hammer in horizontal pipes were extended and simplified into a compact mathematical form based on dimensionless parameters: dimensionless time, water hammer number, etc. Detailed treatment of turbulent water hammer analytical solutions is beyond the scope of thi ...
Leto: 2023 Vir: Fakulteta za strojništvo (UL FS)
Water hammer simulation using simplified convolution-based unsteady friction model
Kamil Urbanowicz, Anton Bergant, Michal Stosiak, Adam Deptuła, Mykola Karpenko, Michał Kubrak, Apoloniusz Kodura
Izvirni znanstveni članek
Oznake: vodni udar;neustaljeno stensko trenje;hidravlični prehodni pojavi;konvolucijski model;računske simulacije;water hammer;hydraulic transients;unsteady friction;convolution-based model;numerical simulation;
Omission of frequency-dependent hydraulic resistance (skin friction) during modelling of the water hammer phenomenon is unacceptable. This resistance plays a major role when the transient liquid flow occurs in rigid-walled pipes (steel, copper, etc.). In the literature, there are at least two differ ...
Leto: 2022 Vir: Fakulteta za strojništvo (UL FS)
Št. zadetkov: 4
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