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Featured researches published by Zoran Čarija.


Croatian Medical Journal | 2012

Irrigation of human prepared root canal – ex vivo based computational fluid dynamics analysis

Damir Šnjarić; Zoran Čarija; Alen Braut; Adelaida Halaji; Maja Kovačević; Davor Kuiš

Aim To analyze the influence of the needle type, insertion depth, and irrigant flow rate on irrigant flow pattern, flow velocity, and apical pressure by ex-vivo based endodontic irrigation computational fluid dynamics (CFD) analysis. Methods Human upper canine root canal was prepared using rotary files. Contrast fluid was introduced in the root canal and scanned by computed tomography (CT) providing a three-dimensional object that was exported to the computer-assisted design (CAD) software. Two probe points were established in the apical portion of the root canal model for flow velocity and pressure measurement. Three different CAD models of 27G irrigation needles (closed-end side-vented, notched open-end, and bevel open-end) were created and placed at 25, 50, 75, and 95% of the working length (WL). Flow rates of 0.05, 0.1, 0.2, 0.3, and 0.4 mL/s were simulated. A total of 60 irrigation simulations were performed by CFD fluid flow solver. Results Closed-end side-vented needle required insertion depth closer to WL, regarding efficient irrigant replacement, compared to open-end irrigation needle types, which besides increased velocity produced increased irrigant apical pressure. For all irrigation needle types and needle insertion depths, the increase of flow rate was followed by an increased irrigant apical pressure. Conclusions The human root canal shape obtained by CT is applicable in the CFD analysis of endodontic irrigation. All the analyzed values –irrigant flow pattern, velocity, and pressure – were influenced by irrigation needle type, as well as needle insertion depth and irrigant flow rate.


International Journal of Refrigeration-revue Internationale Du Froid | 2014

Heat transfer analysis of fin-and-tube heat exchangers with flat and louvered fin geometries

Zoran Čarija; Bernard Franković; Marko Perčić; Marko Čavrak


Strojarstvo : časopis za teoriju i praksu u strojarstvu | 2008

Validation of Francis Water Turbine CFD Simulations

Zoran Čarija; Zoran Mrša; Sanjin Fućak


Engineering review | 2012

Numerical analysis of Wells turbine for wave power conversion

Zoran Čarija; Lado Kranjčević; Vjekoslav Banić; Marko Čavrak


4th International Congress of Croatian Society of Mechanics | 2003

Complete Francis turbine flow simulation for the whole range of discharges

Zoran Čarija; Zoran Mrša


Strojarstvo | 2008

Validation of Francis Turbine CFD Simulations

Zoran Čarija; Zoran Mrša; Sanjin Fućak


5th International Congress of Croatian Society of Mechanics | 2006

TURBULENT FLOW SIMULATION IN KAPLAN DRAFT TUBE

Zoran Čarija; Zoran Mrša; Luka Dragović


Archive | 2000

CONTROL STRATEGY FOR CONTINUOUSLY VARIABLE PIPES LENGTH OF THE INTAKE MANIFOLD

Vladimir Medica; Zoran Čarija; Bernard Franković


Engineering review | 2014

Numerical analysis of aerodynamic characteristics of a bumped leading edge turbine blade

Zoran Čarija; Emil Marušić; Zdenko Novak; Sanjin Fućak


Proceedings CADAM 2012 | 2013

Portable hydro plant blade movement optimization

Zdenko Novak; Zoran Čarija

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Ivan Samardžić

Josip Juraj Strossmayer University of Osijek

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