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Atomistic-to-continuum modelling in solid mechanics
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Eduard Marenić We focus primarily on the conceptually new class of materials that are only one atom thick, called by common name “graphene”. The experimental measurement of the mechanical properties of graphene is still considered a difficult task, thus quantifying the mechanical properties by the numerical simulations is of great importance.rnWe use molecular mechanics and assume that atoms are the smallest unit needed to be modelled. Due to the lack of computational power, performing a fully...
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Autonomous solar-hydrogen power system
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Motalleb Miri Solar-hydrogen autonomous system for supplying isolated real passive house in real climate with power energy, energy for personal transport and heating/cooling system have been established and discussed. Simulation and analysis of a model of an autonomous power system based only on a renewable source (solar irradiance) integrated with a hydrogen system for energy backup has been performed. Commercially available passive house in island of Hvar in Croatia, and real commercial components...
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Bezmrežna numerička metoda za analizu ploča
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Josip Hoster U radu su predložene nove bezmrežne numeričke metode za analizu deformiranja ploča koje se temelje na metodi lokalnog težinskog ostatka (reziduala), odnosno lokalnoj Petrov-Galerkinovoj (MLPG) metodi. Pritom se provodi integracija slabog oblika uvjeta ravnoteže po lokalnom području integracije. Izbor težinske funkcije u težinskom ostatku je proizvoljan. Ploče su promatrane kao trodimenzijska tijela što omogućuje primjenu trodimenzijskih materijalnih modela. Diskretizacija je...
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Biochemomechanical model of aneurysm growth
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Nino Horvat An abdominal aortic aneurysm (AAA) is a local and irreversible dilatation of the aorta
caused by an imbalance in production and degradation of the extracellular matrix. It has a
high mortality rate, and it is common among the elderly, especially men, with a prevalence
rate estimated between 1 and 9%. Most AAAs develop an intraluminal thrombus (ILT), i.e., a
blood clot attached to the inner aortic wall. The role of ILT in AAA evolution remains
controversial. On the one hand, it decreases...
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Biodizel u prometu kao čimbenik održivog razvoja u Republici Hrvatskoj
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Tomislav Virkes Korištenje obnovljivih izvora energije u skladu je s globalnom strategijom održivog razvoja. Korištenje biogoriva u prometu doprinosi povećanju sigurnosti opskrbe i smanjenju ovisnosti prometnog sektora o nafti, smanjenju udjela emisije stakleničkih plinova iz cestovnog prometa te podupiranju održivog razvoja ruralnih područja. Najvažnija sirovina za proizvodnju biodizela u Hrvatskoj je uljana repica. Otpadno jestivo ulje također je mogući izvor za proizvodnju biodizela, ali je...
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Boundary layer method for unsteady aerodynamic loads determination
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Frane Majić In this work a simple and accurate method for two-dimensional unsteady aerodynamic load determination on airfoil is developed. The method employs viscous-inviscid coupling. The inviscid flow is governed by the unsteady Euler equations solved by finite volume method on moving C-type rigid grid, while viscous flow is governed by steady boundary layer integral equations. The Euler equations are solved in conservative form, in transformed body-fitted coordinates. The viscous-inviscid coupling is...
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Design parameter management in product development process
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Jasmin Juranić Engineering designers in product development organisations face the increasing complexity of
engineering design activities. To accomplish the assigned activities, they reach for various tools
and methods in their daily work that support them in developing products, managing data and
communicating with other designers within a team or outside the team. Thus, design team
members need enhanced software support for design team collaboration, including the
management of design process...
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Development of numerical model for green water loading by coupling the mesh based flow models with the meshless models
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Josip Bašić The interaction between a moving vessel and incident waves leads to large relative motions
and strong nonlinearities. This can result in violent water dynamics so that water flows
onto the deck of the vessel, known as green water, and reaches crucial equipment and
other deck structures. Green water events are considered as serious threat to the stability
and operability of vessels, which should be reliably predicted and properly assessed in
the design stage. Due to complexity of the...
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Development of numerical models within the liquid film and Lagrangian spray framework
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Jakov Baleta Liquid film flow sheared by an external air flow field is a physical phenomenon encountered in many engineering applications such as: burners, rain on vehicle windows and aircraft wings, rocket nozzles, mist eliminators, heat exchangers, steam turbine blades and especially internal combustion (IC) engines. Specifically, liquid wall films affect chemical composition of the gas phase and wall thermal behaviour of these systems. The goal of this research is additional improvement of the...
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