The dynamic analysis of managing units and sectors of economic and industrial activity

Встановлено основні залежності між продуктивністю праці та розмірами підприємства.The main dependences between labor productivity and the sizes of the enterprise and company are defined in this work

The machine-building cluster as a precondition of economic development of Cherkasy region

В роботі запропоновано створення регіонального кластеру машинобудівних підприємств. Формування машинобудівного кластеру призведе до підвищення конкурентоспроможності економіки Черкаської області.The paper presents the creation of the regional cluster of machine-building companies. The machine-building cluster formation will increase the competitiveness the economy of the Cherkasy region

The electronic waste management

В роботі розглянуто важливість управління електронними відходами в Україні.The paper considered the importance of electronic waste management in Ukraine

INVESTIGATION OF TWO-PHASE FLOW HYDRODYNAMICS OF HEAT EXCHANGE TUBE OUTLET FALLING FILM EVAPORATOR

Studies of hydrodynamics and heat transfer in falling film evaporators are presented in a significant number of scientific papers [1, 2, 3]. This work is devoted to the study of a distribution of a gas phase velocity and a liquid phase irrigation density at the outlet of the heat exchange tube of the falling film evaporator.This work was supported by the Russian Foundation for Basic Research (grant # 19-53-55002)

INVESTIGATION OF HYDRODYNAMIC PARAMETERS DISTRIBUTION IN HEAT EXCHANGE TUBES OF FALLING FILM EVAPORATOR

Falling film evaporators have a high heat transfer rate with relatively small volumes of the device [1, 2, 3]. It is advisable to have information about changes in hydrodynamic parameters along the length of heat exchange tubes, when developing a falling film evaporator.This work was supported by the Russian Foundation for Basic Research (grant # 19-53-55002)

Simulation method of the low-Re flows in the packed bed technological equipment

The paper shows the semiempirical method of a numerical simulation of the low-Re flows in the packed bed technological apparatus. The proposed method is based on the Navier-Stokes equations modification by the linear momentum sources equations in the packed bed zones. It is found that the simulation error of the proposed method is not more than 6.2% for low-density finite element meshes. The average value of the simulation error is about 3.0% for all shown cases. It was found that the proposed method simulation error almost independents on the mesh density. In the main, the simulation error is determined by the linear momentum sources equations approximation error. © Published under licence by IOP Publishing Ltd

INVESTIGATION OF THE HYDRODYNAMICS OF MIXING TWO TECHNOLOGICAL MEDIA WITH A SMALL-SIZED AGITATOR

The existing precipitation plant uses a cascade of three reactors connected in series, each with a mixing device and a heat exchanger. Numerical simulation of mixing fluid dynamics was carried out using the ANSYS Fluent CFD code with a standard k-epsilon turbulence model and a mixture model. The study considered a two-phase model with technological media of different densities.This work was supported by the Russian Foundation for Basic Research (grant # 19-53-55002)

INVESTIGATION OF THE HYDRODYNAMICS OF MIXING TWO TECHNOLOGICAL MEDIA USING A SIX-BLADE AGITATOR

The precipitation of ammonium polyuranate is carried out in a cascade of reactors equipped with a agitator and a heat exchanger. In the course of this study, the existing mixing device was replaced by a six-blade 3D model of which is shown in Figure 1. Data ere obtained on the distribution of two technological media and flow rates in the volume of the apparatus at different operating modes of the mixing device.This work was supported by the Russian Foundation for Basic Research (grant # 19-53-55002)

Evaluation of associations of enterprises (organizations)

У роботі представлено характеристику різних об’єднань підприємств. Визначено сутність кластеру та його структура.The characteristic of various business associations is presented in this work. The essence of the cluster and its structure are determined