Jindrich Necas

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There is clear and incontrovertible evidence that the viscosity of many liquids depends on the pressure. While the density, as the pressure is increased by orders of magnitude, suffers small changes in its value, the viscosity changes dramatically. It can increase exponentially with pressure. In many fluids, there is also considerable evidence for the(More)
After exposure for several days of intensively growing algal cultures to a radium concentration of 10(-6) g.1(-1) the physiological and genetic responses of Chlorella kessleri and Scenedesmus obliquus cells could be clearly demonstrated. Of physiological characteristics, we recorded the frequency of cells with a reduced number of autospores, the length of(More)
We present numerical evidence for the blow-up of solution for the Euler equations. Our approximate solutions are Taylor polynomials in the time variable of an exact solution, and we believe that in terms of the exact solution, the blow-up will be rigorously proved. Résumé. Nous présentons une solution numérique deséquations d'Euler montrant la solution(More)