In this work, we contribute to the development of numerical algorithms for the direct simulation of three-dimensional incompressible multiphase flows in the presence of multiple fluids and solids. The volume of fluid method is used for interface tracking, and the Brinkman penalization method is used to treat solids / the latter is assumed to be per...
Cilj zaključne naloge je bil predstaviti tehnologijo vakuumskega litja, pojasniti vpliv podtlaka v kalupu in izdelati numerični model prevoda toplote med gravuro in talino. Najprej smo opisali postopek vakuumskega litja in pogoste napake, ki se pojavijo pri postopku litja. Pri opisu delovanja simulacije smo se osredotočili na programski paket Magma...
Bakalářská práce se zabývá numerickou simulací dvourozměrného proudění zobecněných Newtonovských tekutin. Součástí práce je odvození základních rovnic popisujících proudění nestlačitelné tekutiny, definice fyzikálních pojmů, které jsou v práci užívány a popis lidského oběhového systému, na který může být použitá geometrie aplikována. K numerickému ...
The context of this paper is the simulation of parameter-dependent partial differential equations (PDEs). When the aim is to solve such PDEs for a large number of parameter values, Reduced Basis Methods (RBM) are often used to reduce computational costs of a classical high fidelity code based on Finite Element Method (FEM), Finite Volume (FVM) or S...
The performance of an induction motor, a core component of the high-speed train, is of critical importance to the safety of the train. As a result of limited space in the train and the motor’s high-power density, motor heating poses a grave threat to its service life and operational safety. In this study, a 600-kW high-speed train induction motor m...
Public supply wells are commonly considered one of the most significant sources of freshwater on Earth. Therefore, potential well water contamination can conceivably be regarded as a crucial issue that is closely correlated with both environmental protection and water demand. In the present study, a three-dimensional numerical model is developed to...
This work presents a detailed numerical investigation on the required development length (L=L/B) in laminar Newtonian fluid flow in microchannels with rectangular cross section and different aspect ratios (AR). The advent of new microfluidic technologies shifted the practical Reynolds numbers (Re) to the range of unitary (and even lower) orders of ...
In this article we deal with numerical solution of macroscopic models of pedestrian movement. From a macroscopic point of view, pedestrian movement can be described by a system of first order hyperbolic equations similar to 2D compressible inviscid flow. For the Pedestrian Flow Equations (PFEs) the density ρ and the velocity v are considered as the...
Tool temperature variation in flank milling usually causes excessive tool wear, shortens tool life, and reduces machining accuracy. The heat source is the primary factor of the machine thermal error in the process of cutting components. Moreover, the accuracy of the thermal error modeling is greatly influenced by the formation mechanism of the heat...
Tématem této práce je vytvoření numerického modelu proudění nenewtonské tekutiny. Jsou zde uvedeny rovnice popisující proudění vazké nestlačitelné tekutiny a různé modely nenewtonské tekutiny. Dále jsou popsány způsoby řešení těchto rovnic - metoda umělé stlačitelnosti, metoda konečných objemů a iterační metody pro řešení vzniklé soustavy rovnic. Ř...
