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Usage of Fluent in computations of unsteady flow in large networks
Pavelka, František ; Štefan, David (referee) ; Himr, Daniel (advisor)
The main objective of this Master´s thesis is the appropriate calculation proposal of pressure and discharge conditions in extensive ducts in unsteady flow. The calculation proposal was aimed at the conenction of two commercial programmes. Exacly the programme Ansis Fluent and Matlab, which deals with the connection of onedimensional (1D) calculation in Matlab and multidimensional (2D) calculation in Ansys Fluent programme. This Mastr’s thesis also deals with creation of the independent 1D model (Matlab, method of characteristic) and independent 2D model flow (Ansys Fluent, Inviscid model).
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Pressure drop determination of the charging pump in the water level oscillation dependence
Sůkal, Jaroslav ; Hudec, Martin (referee) ; Fialová, Simona (advisor)
The bachelor thesis deals with basic equations of hydromechanics. The derivation process of Euler equation for hydrodynamics and Bernoulli equation is outlined. It also includes the analysis of the real liquids flow as well as the friction losses. The oscilatory motion in between two joint tanks is described. The phenomenon is solved by Bernoulli equation with an unsteady term. A part of the thesis treats the derivation process of the equation of the equilibrum surface deflection description and its simplified resolving. A model problem of the phenomenon is put forward.
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Hydraulic losses during unsteady flow of liquid in a pipe
Svoboda, Jakub ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
This thesis is focused on solving hydraulic losses during unsteady flow of liquid in pipe for both laminar and turbulent flow in smooth pipes. Radial viscosity distribution is assumed to be the same as for steady flow. Viscosity distribution is derived from velocity profile, which is mathematically described with suitably chosen function. Laplace images of unsteady velocity profile and mean velocity in cross-section are derived depending on pressure difference. Loss coefficient is derived and on base of transfer matrix method, self-numbers are calculated. Self-numbers represent attenuation and own frequency. Self-numbers are compared to values from software called “F-ACHAR” and loss coefficient is compared to the one for quasi-steady method.
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Solution of Poiseuille and plane Couette flow associated with the dynamic boundary conditions
Vejvoda, Martin ; Málek, Josef (advisor) ; Kaplický, Petr (referee)
In the presented work we study the effect of dynamic boundary conditions on Couette and Poisseuille flows that represent two types of flow between two parallel impervious plates. In the firts part, the Navier-Stokes equations are considered describing flows of an incompressible Newtonian fluid, and dynamic boundary conditions in general three- dimensional setting. Then we look at how our problem reduces in the simplified geome- trical setting. In the second part, we study several selected problems, some of them are supported by numerical simulations. 1
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Solution of Poiseuille and plane Couette flow associated with the dynamic boundary conditions
Vejvoda, Martin ; Málek, Josef (advisor) ; Kaplický, Petr (referee)
In the presented work we study the effect of dynamic boundary conditions on Couette and Poisseuille flows that represent two types of flow between two parallel impervious plates. In the firts part, the Navier-Stokes equations are considered describing flows of an incompressible Newtonian fluid, and dynamic boundary conditions in general three- dimensional setting. Then we look at how our problem reduces in the simplified geome- trical setting. In the second part, we study several selected problems, some of them are supported by numerical simulations. 1
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Usage of Fluent in computations of unsteady flow in large networks
Pavelka, František ; Štefan, David (referee) ; Himr, Daniel (advisor)
The main objective of this Master´s thesis is the appropriate calculation proposal of pressure and discharge conditions in extensive ducts in unsteady flow. The calculation proposal was aimed at the conenction of two commercial programmes. Exacly the programme Ansis Fluent and Matlab, which deals with the connection of onedimensional (1D) calculation in Matlab and multidimensional (2D) calculation in Ansys Fluent programme. This Mastr’s thesis also deals with creation of the independent 1D model (Matlab, method of characteristic) and independent 2D model flow (Ansys Fluent, Inviscid model).
|
|
|
Hydraulic losses during unsteady flow of liquid in a pipe
Svoboda, Jakub ; Pochylý, František (referee) ; Habán, Vladimír (advisor)
This thesis is focused on solving hydraulic losses during unsteady flow of liquid in pipe for both laminar and turbulent flow in smooth pipes. Radial viscosity distribution is assumed to be the same as for steady flow. Viscosity distribution is derived from velocity profile, which is mathematically described with suitably chosen function. Laplace images of unsteady velocity profile and mean velocity in cross-section are derived depending on pressure difference. Loss coefficient is derived and on base of transfer matrix method, self-numbers are calculated. Self-numbers represent attenuation and own frequency. Self-numbers are compared to values from software called “F-ACHAR” and loss coefficient is compared to the one for quasi-steady method.
|
|
|
Pressure drop determination of the charging pump in the water level oscillation dependence
Sůkal, Jaroslav ; Hudec, Martin (referee) ; Fialová, Simona (advisor)
The bachelor thesis deals with basic equations of hydromechanics. The derivation process of Euler equation for hydrodynamics and Bernoulli equation is outlined. It also includes the analysis of the real liquids flow as well as the friction losses. The oscilatory motion in between two joint tanks is described. The phenomenon is solved by Bernoulli equation with an unsteady term. A part of the thesis treats the derivation process of the equation of the equilibrum surface deflection description and its simplified resolving. A model problem of the phenomenon is put forward.
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