Naslov
Numerička analiza utjecaja hrapavosti korita na kinematičke veličine hidrauličkog skoka
(Numerical analysis of the influence of roughness on kinematic characteristics of hydraulic jump)

Autori
Brusić, Daniel

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, diplomski rad, diplomski

Fakultet
Građevinski fakultet

Mjesto
Rijeka

Datum
14.11

Godina
2017

Stranica
77

Mentor
Travaš, Vanja

Ključne riječi
numerical modelling, hydraulic jumps, OpenFOAM, k-epsilon turbulent model
(numerical modelling, hydraulic jumps, OpenFOAM, $k-\varepsilon$ turbulent model)

Sažetak
Due to its high intensity of turbulence, hydraulic jumps are very attractive to study but also very important phenomenon from the practical point of view. Hydraulic jumps are often used as an effective way of dissipating energy. A numerical model was used to simulate a hydraulic jump inside a rectangular open channel. At the beginning of the thesis, a mathematical model of flow is given. All the equations that describe the k-epsilon turbulence model are presented as well as the "Volume of Fluid" method for solving a two phase flow. To perform a particular parametric analysis of the flow inside the hydraulic jump, the software OpenFOAM was used to numerically reproduce the flow field. Results show the dissipation of mechanical energy caused by the viscous forces, and the approximation of the turbulent structure of the flow. The simulation was run for five different roughness cases in order to glimpse at the interesting proposition that wall roughness can not be neglected when predicting the kinematic properties of a jump.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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