volumetric flow rate

The study focuses on the construction and application of nomograms for describing the formation of swirling air jets, widely used in ventilation systems. These jets have a complex three-dimensional structure with axial, radial, and tangential velocity components, which enhance mixing, reduce gradients, and improve air distribution efficiency. To adequately represent these processes, the paper proposes a methodology for building nomograms based on analytical expressions of axial velocity and excess temperature in non-isothermal jets.

Building-up of plaque narrows arteries, decreasing blood flow to the heart, causing chest pain, shortness of breath, or other coronary artery disease signs and symptoms.  Implementing Navier–Stokes equations in a cylindrical coordinate system and assuming axial symmetry under laminar flow conditions, the study has been conducted on the two aspects of blood flow dynamics viz., velocity profile and volumetric flow rate of blood around curved stenosis with a variation of curvature of the artery and the stenosis thickness.  The blood flow behavior taking different values for the viscosity coeff

Conversion of C4 fraction of hydrocarbon pyrolysis products over high-silica zeolite catalyst ZVM modified by 2 mas % of Zn within the temperature range of 623–823 K and volumetric flow rates of 1000–10000 h-1 has been investigated. The yield and chemical composition of gaseous and liquid products have been determined under various conditions. It has been shown that the initial fraction is converted almost completely (98–100 %); the yield of C6-C8 lower arenes is 44.2–65.4 % within all investigated ranges of temperature and volumetric flow rates.

C2–C4 alkenes conversion over high-silica zeolite catalyst modified with 2 mas % of Zn has been investigated at the laboratory plant of flow type within temperatures ranges of 723–773 K and volumetric flow rates 1000–30000 h-1. It has been shown that a propylene high conversion and high yield of liquid catalizate containing lower arenes are achieved at space velocities of 20000 h-1.