In the stability theory of shear layers, the term `local stability' refers to the stability properties of a particular velocity profile at a given position in the flow. When the basic flow develops the streamwise direction, e.g. in a growing boundary layer, the changing local stability properties can be mapped out downstream. If there are regions of local absolute instability then there is the possibility of a `global instability' of the entire flow. When the basic flow varies slowly in the downstream direction the global stability can be determined from the local stability.  »»» 

Large deformations of a solid are investigated. We use a polar decomposition of gradient matrix F = RW (R is rotation matrix, W is stretch matrix). Large deformations of solids involve local spacial interactions either in an extension or in a rotation. Because local interactions are well described by spacial gradient, matrix W intervene for extensions and matrix gradR intervene for rotations. Thus the free energy depends on W and on gradR. Moreover, free energy takes into account the local impenetrability condition. Reactions to this impenetrability condition are important in constitutive laws.  »»» 

Turbulence will be introduced as the typical state of real flowing viscous fluids (historical overview). Attributes of turbulence will be presented (diffusivity, deterministic chaos, fractal structure…). A mathematical model will be introduced and its basic properties will be shown including the Kolmogorov theory. Then a few phenomenological aspects will demonstrate the typical features of the phenomenon (stability, complexity…).

Dr. Hiromasa Nakayama is a researcher in the Japan Atomic Energy Agency, Ibaraki, Japan.

Abstract: There is a potential problem that hazardous and flammable materials are accidentally or intentionally released into the atmosphere, either within or close to populated urban areas. For the assessment of human health hazard from toxic substances, the existence of high concentration peaks in a plume should be considered.  »»» 

We kindly invite you to the following two lectures:  »»» 

We kindly invite you to the following two lectures:  »»» 

The highly accurate simulation of turbulent rotating flows within cavity is of interest for both engineering applications, such as designing rotational machinery, and fundamental research, as one of the simplest cases where the turbulent boundary layers are three-dimensional. Attempting to compute these flows using statistical approaches has had only partial success.  »»» 

When a disk rotates at constant angular velocity in otherwise still fluid a boundary layer flow is established close to the disk. Obviously the local velocity of the disk increases with radius, but to a first approximation, this radial variation of the basic flow can be neglected to produce a "local" parallel-flow linear stability theory.  »»» 

Abstract: Model of the human cardiovascular system is applied for the quantitative evaluation of the human activity. The entropy production was used as a relevant quantity. The comparison with the ergonometric tests is shown.

Presenter: Dipl.-Ing. Philipp Rauschenberger

Resume: The objective of ERASMUS project was further development and testing the new noninvasive diagnostics method of human skin under variable mechanical loading in-vivo. The method is based on monitoring instantaneous changes of ultrasound propagation along the skin.  »»» 

This seminar gives an introduction of the research activities in Prof. Darina Murray's heat transfer group at Trinity College Dublin, focusing specifically on synthetic jet impingement.  »»» 

The Czech Society for Mechanics – the expert group for Computational mechanics and the Institute of Thermomechanics AS CR wish to invite you to a lecture by  »»» 

Abstract: 

The lecture is devoted to development of the Theory of helical vortices. The main items of the theory are as follows:  »»» 

Abstract:
Proper Orthogonal Decomposition (POD) is widely used in the field of Reduced Order Modeling (ROM). Based on a large data set of a turbulent flow, a few POD modes are sufficient to characterize the dynamics of the underlying flow. Instability waves that grow in turbulent shear layers are usually represented by two coupled POD modes.  »»» 

The Institute of Physics AS CR - Dept. of Theory of Condensed Matter, the Institute of Thermomechanics AS CR and the Czech Society for Mechanics – the expert group for Computational mechanics, jointly invite you to a lecture  »»» 

Dr. Rob Miller undertook his undergraduate, PhD and a research fellowship at Oxford University. For the last eight years he has been a Lecturer in Turbomachinery at the Whittle Laboratory in Cambridge University.  »»» 

Dr. J. Healey graduated with a degree in physics at Oxford University in 1987, where he also obtained a DPhil in physics in 1991. His doctoral thesis was concerned with the analysis of phase spaces reconstructed from time series data. In 1991 he was appointed to a post-doctoral position in the Engineering Department at Cambridge University to work on the laminar-turbulent transition of boundary layers. In 1996 he was appointed first to a temporary lectureship in the Mathematics Department at Brunel University, and then to a lectureship in the Mathematics Department at Keele University.  »»» 

Чашечкин Юлий Дмитриевич (Chashechkin Yu.D.)
Professor and Head of the Laboratory of Fluid Mechanics of the Institute for Problems in Mechanics of the Russian Academy of Sciences
101/1 prospect Vernadskogo, Moscow 119574, Russia,
(E-mail: chakin@ipmnet.ru / Fax: 8 499 739 9531 / Phone 7495434 0192)  »»» 

Prof. Atsushi Suzuki is the assistant professor of Kyushu University in Japan and also visiting researcher at Czech Technical University in Prague.  »»» 

Prof. Seifert will present two recent research projects conducted in Tel Aviv using active flow control. The first project describes taking airfoil separation control concept to flight while the second describes the application of the newly developed suction and oscillatory blowing actuator for aerodynamic drag reduction of large trucks.  »»» 

Main topics of the research of Dr. de Lange are the boundary layer transition, heat transfer and cooling in gas turbines and the thermodynamics and transient behavior of turbine/compressor systems.The flat plate boundary layer experiments in a water channel have been performed.  »»» 

As you surely know, prof. Ari Glezer is the originator of the term „synthetic jet“ and the founder of this particular branch of fluid mechanics.  »»» 

Abstract: While the field equations for complex fluids are usually formulated such that they respect the principles of nonequilibrium thermodynamics, the choice of  »»»