Open Access – Statement
Scientific and professional articles in the journal Ventil are published in open access under the CC-BY-4.0 license. Authors are not charged for publishing the article.
Validation of the gas flow rate measuring system with the laminar flow element
The main component of a laminar flowmeter is a laminar flow element, which cross-section is made of capillary passages. The gas flows through the passageway under laminar conditions, therefore the Hagen- Poiseuille equation…
Tribological tests with hydraulic pumps at variable load
In the field of hydraulic pump based tribological tests, there are a few different tests that are designated to reproduce real operating conditions …
Development of servo hydraulic drive in the area of fracture mechanics
Material fatigue testing machines are used in laboratory and industrial environments for testing and research in fracture mechanics and are typically operated by servo hydraulic or servo pneumatic actuators …
Certification According to Cradle to Cradle® Method
The Cradle to Cradle® concept defines and develops the reuse of products. Compared to traditional recycling, it maintains the same level of quality of raw materials through the life cycles of several products, and only safe chemicals are used …
Experimental study of the void fraction distribution in a bisectional bubble-column reactor
This paper presents the distribution of the local void fraction (LVF) in a pilot bisectional bubble-column reactor with a diameter of 0.63 m, where the two-phase mixing of air and water was performed with a static mixer. Because of the lack of such data in the literature, the LVF was measured at 342 nodes in the vertical half-section plane of the column …