Journal of Fluid Technics, Advanced Engineering and Technologies
Ventil is a peer-reviewed open access scientific as well as professional journal.
The journal’s basic mission is to transfer knowledge into practice, further develop and popularize the fields of fluid mechanics, advanced engineering and technologies, as well as to care for professional terminology in the aforementioned fields.
Publisher: University of Ljubljana, Faculty of Mechanical Engineering
Editor-in-chief: izr. prof. dr. Miroslav Halilovič
Assistant editor: izr. prof. dr. Franc Majdič
Technical editor: Roman Putrih
THE JOURNAL IS IN OPEN ACCESS
Ventil is open access journal with no article publishing charges. Authors retain copyright of their work and allow it to be shared and reused, provided that it is correctly cited.
Articles in Journal Ventil are published under the Creative Commons Attribution 4.0 International License.
The Journal is subsidized by the Slovenian Research and Innovation Agency (ARIS).
Publication frequency: 6 issues per year.
The journal Ventil is indexed in the DOAJ database.
Current issue: August, 32 / 2026 / 4
Previous issues of the magazine can be viewed in the ARCHIVE section.
Featured articles
INNO2MARE – Pilot projects to strengthen the capacity and scientific excellence of Slovenian and Croatian innovation ecosystems
The LASIM laboratory at the Faculty of Mechanical Engineering, University of Ljubljana, is coordinator of the INNO2MARE project, which aims to strengthen the capacities for excellence in the innovation ecosystem of Western Slovenia and the Adriatic Croatia through a set of jointly designed and implemented actions that will support the digital and green transition of the maritime and related industries.
Petra Pintar, doc. dr. Marko Šimic, prof. dr. Niko Herakovič, univ. dipl. inž., all from Faculty of Mechanical Engineering, University of Ljubljana
Durability tests of 3D printed water-hydraulic proportional directional control valves
Despite the fact that water is rarely used in power-control hydraulics (PCH), advanced technologies such as 3D printing of metal components are opening new possibilities for the wider adoption of water PCH. With metal 3D printing, valve mass can be significantly reduced while improving flow characteristics, thanks to the ability to produce complex internal geometries not achievable with traditional methods.
Žan Spačal, študent. izr. prof. dr. Franc Majdič, univ. dipl. inž., prof. dr. Mitjan Kalin, univ. dipl-. inž., dr. Ana Trajkovski, univ. dipl. inž., Univerza v Ljubljani, Fakulteta za strojništvo
LEAP – razvoj zaščitne embalaže iz alternativnih lignoceluloznih vlaken
Laboratorij LADISK na Fakulteti za strojništvo Univerze v Ljubljani deluje kot koordinator projekta LEAP, katerega cilj je razvoj naslednje generacije trajnostne funkcionalne em- balaže. Ta vključuje gradnike iz odpadne biomase invazivnih tujerodnih rastlinskih vrst in omogoča izdelavo novih, konstrukcijsko visoko zmogljivih embalažnih rešitev. Projekt je izjemno pomemben, saj se osredotoča na trajnostni prehod v krožno ekonomijo, ki te- melji na biološki razgradljivosti in zmanjšanju porabe deviških materialnih virov, obenem pa obravnava problematiko recikliranja odpadkov tujerodnih rastlinskih vrst.
Gregor Čepon, Gregor Ševerkar, Miha Pogačar, Urška Kavčič, David Ravnjak, Jawad Elomari, Aleš Mihelič, Miha Bolteža
Science and expert articles
Preventing Lubrication Problems and Failures
Effective lubrication is one of the key prerequisites for the reliable operation and long service life of industrial machinery and equipment. Despite significant advances in lubricants, lubrication systems, and condition monitoring techniques, lubrication-related failures remain a major cause of damage to bearings, gearboxes, and hydraulic systems.
Tribological and functional limitations of universal engine oils in hydraulic systems
Universal motor oil can also function satisfactorily as hydraulic oil. However, if universal motor oil is used as hydraulic oil solely because of its high viscosity index (VI) – that is, because of its stable kinematic viscosity regardless of temperature changes – then this is not the right solution. This is, of course, related to the additives that increase the viscosity index.
New approaches, technologies and trends in production pneumatic systems and processes
The development of miniature 3D-printed and soft pneumatic actuators enables lightweight, flexible and safe solutions for use in robotics and biomedical applications. Proportional and digital pneumatics are further developing towards Industry 4.0, with reinforcement learning methods improving the adaptability of control systems.