Heat transfer in heated industrial premises with using radiant heating system

The results of mathematical modeling of heat transfer processes in a closed air volume surrounded by enclosing constructions, heated by supplying energy to the upper contour of gas infrared radiators are represented. Regimes of turbulent natural conjugate convection in the region bounded by solid walls are investigated. Two-dimensional nonstationary problem is solved in the framework of the Navier -Stokes equations for gas and thermal conductivity for solid walls. Nonstationary processes of heat propagation in course of time and essential heterogeneity of temperature fields and heat fluxes are established

The investigation of ability for the profession choice by students in forms 9-11 of the comprehensive school

Приводятся данные исследования, направленного на выявление умений учащихся 9-11 классов составлять формулу профессии, умений строить осознанные схемы личного профессионального плана. Проводится оценка общей способности к выбору профессии у школьников.The authors present the data of the study aimed at showing up the skills of students in grades 9-11 to make the formula of profession, the ability to create a conscious layout of personal professional plan. The assessment of the general ability to the profession choice by schoolchildren is con-ducted

evidence from South Korea

Thesis(Master) --KDI School:Master of Development Policy,2016OutstandingmasterpublishedAnna NAGORNOVA

Transparent Layered Materials Based on Variable Color Polyolefins

AbstractColor bright visual effects in polyolefin layered film materials for the production of consumer goods packaging are described. A multi-color light reflection by a package of films varies in case of a light angle change, depends on a thickness and number of layers. The relation between anisotropy, crystallinity and nanostructure of polyethylene and polypropylene films and their color in polarized light is identified. The fact of recrystallization of a part of fibrils in heat treatment in the course of films duplicating which reduces the effect of pleochroism is established by differential scanning calorimetry and electron microscopy techniques. The films duplicating processes with a simultaneous marking protecting the packed production against counterfeit are suggested

Conjugate heat transfer in a closed volume with the local heat sources and non-uniform heat dissipation on the boundaries of heat conducting walls

Is solved the problem of heat transfer in the closed volume, limited by heat-conducting walls, with the local source of heat emission and the heterogeneous conditions of heat sink on the outer boundaries of solution area. The problem of convective heat transfer is solved with using a system of differential Navier-Stokes equations in the Boussinesq approximation. The simulation of turbulent flow conditions of heated air is carried out within the framework to k-ε model. On the basis the analysis of the obtained temperature field and the contour lines of stream functions is made conclusion about the essential transiency of the process in question. The obtained values of temperatures and speeds in different sections of region illustrate turbulence of the process. Are investigated laws governing the formation of temperature fields in closed areas with a local heat emission source under the conditions of intensive local heat sink into environment and accumulation of heat in the enclosing constructions

Numerical simulation of hydrodynamics and heat transfer in the technological reservoir with the heat pump

The mathematical modeling of mixed convection of viscous incompressible fluid in a rectangular reservoir with the sources of input and output of mass has been carried out. Is studied the influence of heat sink as a result of the work of heat pump and its position on the formation of convective flows and a change in the temperature conditions. Are revealed basic laws governing the heat transfer in the small environment of heat pump. The analysis of the influence of Reynolds numbers on the intensity of the heat exchange is carried out

Gender in digital culture

The article discusses digital culture as new socio-cultural reality, under the influence of which radical shifts in the category of «gender» occur. The article focuses on network generation as the most exposed to the impact of modern cultureРассмотрена цифровая культура как новая социально-культурная реальность, под влиянием которой происходят кардинальные сдвиги в категории «гендер». Делается акцент на сетевом поколении как наиболее подверженном влиянию современной культур

Digital culture as a factor of social and vocational mobility

Digital culture represents a new social and cultural reality, which is mostly, determines lifestyle motivation, methods and forms of communication and human behavior as well. So-called Millennial generation, which is digitally culture determined and increasingly defining essence, criteria and forms of social and vocational mobility, comes to a foreground of modern lifeИсследуется цифровая культура, которая олицетворяет собой новую социально-культурную реальность, во многом определяющую образ жизни, мотивацию, способы и формы коммуникации и поведения человека. Отмечается, что на первый план выходит сетевое поколение, наиболее подверженное влиянию цифровой культуры и все более определяющее сущность, критерии и формы проявления социально-профессиональной мобильност

Numerical Investigations of Mixed Convection of Incompressible Viscous Fluid in LNG Storage with a Various Locations of Input and Output Mass

The article shows the results of mathematical simulation of mixed convection in the low-temperature storage of liquefied natural gas with a regenerative cooling. The regimes of mixed convection in a closed area with the different arrangement of the input and output sections of the masses are investigated. Two-dimensional nonstationary problem in the model of the Navier-Stokes in dimensionless variables "vorticity - stream function - temperature" was examined. Are obtained distributions of the hydrodynamic parameters and temperatures, characteristic basic laws governing the processes being investigated. Detailed circulating currents and carried out analysis of the mechanism of vortices formation and the temperature distribution in the solution for mixed convection mode with low Reynolds and Grashof numbers (Gr=10{6}, 100<Re<1000). Is established the significant influence of the geometrical arrangement of the input and output mass sections and input stream velocity on the structure of liquid flow and temperature in the low temperature LNG storage tanks

Analysis of influence of heat insulation on the thermal regime of storage tanks with liquefied natural gas

Is numerically investigated the process of convective heat transfer in the reservoirs of liquefied natural gas (LNG). The regimes of natural convection in a closed rectangular region with different intensity of heat exchange at the external borders are investigated. Is solved the time-dependent system of energy and Navier-Stokes equations in the dimensionless variables “vorticity – the stream function”. Are obtained distributions of the hydrodynamic parameters and temperatures, that characterize basic regularities of the processes. The special features of the formation of circulation flows are isolated and the analysis of the temperature distribution in the solution region is carried out. Is shown the influence of geometric characteristics and intensity of heat exchange on the outer boundaries of reservoir on the temperature field in the LNG storage