The Riemann problem for functions with polar lines of higher orders

© 2014, Allerton Press, Inc. We consider solutions of the jump problem, homogeneous and inhomogeneous Riemann problems for functions with polar lines of orders pk +1 (k = 1, 2, … ), pk ⩾ 0. We study the cases of continuous and discontinuous coefficients. In the special case pk = 0 the obtained results turn into the earlier known ones

Estimation of turbulent diffusion transport in the boundary layer by the SIV method

© 2018 Institute of Physics Publishing. All rights reserved. The study aims at an experimental estimation of turbulent diffusion transport of Reynolds stresses in a developed turbulent zero-gradient boundary layer. Estimates were derived from dynamics of two-component instantaneous velocity vector fields measured by an Smoke Image Velocimetry (SIV) optical method. The obtained profiles were compared with DNS results at a similar value of Reτ

The Schwarz problem for infinite sets of intervals

© 2016, Allerton Press, Inc.We solve the Schwarz problem for boundary contours consisting of countable sets of segments with limit point at infinity, including the periodic case. The solution is a result of a reduction to corresponding Riemann boundary-value problems

Estimating of higher order velocity moments and their derivatives in boundary layer by Smoke Image Velocimetry

© Published under licence by IOP Publishing Ltd. The results of an experimental evaluation of the third-order moments profiles of velocity fluctuations and their partial derivatives in a zero pressure-gradient turbulent boundary layer are presented. Profiles of characteristics are estimated on the basis of the dynamics of two-component instantaneous velocity vector fields measured by the optical method Smoke Image Velocimetry (SIV). Comparison SIV-measurements with the results of measurements by a thermoanemometer and DNS data with similar Re θ and Re τ showed good agreement between the profiles of + , + , ∂ + /∂y + ∂ + /∂y + obtained by SIV and DNS

Uso das oportunidades do software messenger na educação à distância

Nowadays, the use of distance learning in the educational process of a university is becoming relevant. The current conditions stimulate and intensify the use of innovative training tools, in particular, network software products. This paper analyzed the possibilities and costs of using various digital products in an educational environment. In particular, they consider the use of mobile digital solutions for distance learning, as well as the requirements for the development of such tools by teachers who do not have the skills to create software at a professional level. The Telegram messenger example describes the experience of using instant messengers in the learning process, namely, a chat bot was created to organize the control of knowledge of students in a higher educational institution. The original chat bot, which was developed using the Telegram API interface and the Chattera chat bot designer, tests the knowledge and skills of students undergoing “General and professional pedagogy” educational discipline. This study showed that the potential of the messenger is not only in communication between users in the form of sending audio, video, and text messages, but also in its educational capabilities.Hoy en día, el uso de la educación a distancia en el proceso educativo de una universidad está cobrando relevancia. Las condiciones actuales estimulan e intensifican el uso de herramientas de formación innovadoras, en particular, productos de software de red. En este trabajo se analizan las posibilidades y costos de utilizar diversos productos digitales en un entorno educativo. En particular, consideran el uso de soluciones digitales móviles para la educación a distancia, así como los requisitos para el desarrollo de dichas herramientas por parte de profesores que no tienen las habilidades para crear software a nivel profesional. El ejemplo de Telegram messenger describe la experiencia de usar mensajería instantánea en el proceso de aprendizaje, es decir, se creó un chat bot para organizar el control del conocimiento de los estudiantes en una institución de educación superior. El chat bot original, que se desarrolló utilizando la interfaz API de Telegram y el diseñador de chat bot Chattera, evalúa los conocimientos y habilidades de los estudiantes de la disciplina educativa de “pedagogía general y profesional”. Este estudio mostró que el potencial del mensajero no está solo en comunicación entre usuarios en forma de envío de mensajes de audio, video y texto, pero también en sus capacidades educativas.Atualmente, o uso do ensino à distância no processo educacional de uma universidade está se tornando relevante. As condições atuais estimulam e intensificam o uso de ferramentas de treinamento inovadoras, em particular, produtos de software de rede. Este trabalho analisou as possibilidades e os custos do uso de vários produtos digitais em um ambiente educacional. Em particular, eles consideram o uso de soluções digitais móveis para o ensino à distância, bem como os requisitos para o desenvolvimento de tais ferramentas por professores que não possuem as habilidades necessárias para criar software a nível profissional. O exemplo do Telegram messenger descreve a experiência do uso de mensageiros instantâneos no processo de aprendizagem, ou seja, foi criado um chat bot para organizar o controle do conhecimento dos estudantes em uma instituição de ensino superior. O chat bot original, que foi desenvolvido utilizando a interface Telegram API e o designer do Chattera chat bot, testa os conhecimentos e habilidades dos estudantes que se submetem à disciplina educacional "Pedagogia geral e profissional". Este estudo mostrou que o potencial do mensageiro não está apenas na comunicação entre usuários na forma de envio de mensagens de áudio, vídeo e texto, mas também em suas capacidades educacionais

The Riemann problem for functions with polar lines of higher orders

© 2014, Allerton Press, Inc. We consider solutions of the jump problem, homogeneous and inhomogeneous Riemann problems for functions with polar lines of orders pk +1 (k = 1, 2, … ), pk ⩾ 0. We study the cases of continuous and discontinuous coefficients. In the special case pk = 0 the obtained results turn into the earlier known ones

The Riemann problem for functions with polar lines of higher orders

© 2014, Allerton Press, Inc. We consider solutions of the jump problem, homogeneous and inhomogeneous Riemann problems for functions with polar lines of orders pk +1 (k = 1, 2, … ), pk ⩾ 0. We study the cases of continuous and discontinuous coefficients. In the special case pk = 0 the obtained results turn into the earlier known ones

The Schwarz problem for infinite sets of intervals

© 2016, Allerton Press, Inc.We solve the Schwarz problem for boundary contours consisting of countable sets of segments with limit point at infinity, including the periodic case. The solution is a result of a reduction to corresponding Riemann boundary-value problems

The Schwarz problem for infinite sets of intervals

© 2016, Allerton Press, Inc.We solve the Schwarz problem for boundary contours consisting of countable sets of segments with limit point at infinity, including the periodic case. The solution is a result of a reduction to corresponding Riemann boundary-value problems

Drop entrainment in two-phase non concurrent film flow

© 2019 Published under licence by IOP Publishing Ltd. When the motion vectors of the media are collinear, well-known experimentally obtained empirical criteria are used to assess the conditions for the drop entrainment by the gas flow from the surface of a moving liquid film. However, blowing a liquid film at an angle with gas causes a tangential component in the film movement, which is an additional factor affecting its thickness and the velocity profile. The paper presents the correctness of the criterion of the conditions for the drop entrainment and the effect of the noncollinearity of the vectors of the media counterflow on the dynamics of a liquid film estimated from the results of numerical simulation