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National Repository of Grey Literature 14 records found  previous11 - 14  jump to record: Search took 0.00 seconds. 
Artical Reynolds numbers for pulsatile flow in the circular tube
 Klimeš, František ; Kořenář, Josef
The problems of the stability of a laminar pulsating flow have their importance in cardiovascular fluid dynamics. The decelerated flow of blood after a contraction of the left ventricle (in systole) can be laminary even at a considerable high Reynolds' numbers. We presented a description of our experimental equipment and obtained results together with results published by several invesigators. Results indicated that the critical Reynolds number depends markedly on frequency similarity parameter and velocity or volume flow ratio.
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Dependence of Reynolds stresses on some parametres of pulsatile flow of fluid
 Adamec, J. ; Nožička, J. ; Kořenář, Josef
This paper deals with the experimental investigation of dependence of Reynolds stress in pulsatile flow of newtonian fluid in rigid round tubes on parameters of the flow, like mean Reynolds number, frequency similarity parameter (Womersely number) and flow volume ratio.
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Global and partical regularity in the Navier-Stokes equations
 Skalák, Zdeněk
Global and partal regularity of the Navier-Stokes equations is studied. The concept of a suitable weak solution is used and then an estimate of the dimension of the set of singular points on the boundary is presented.
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Hydrodynamc research of the steady and pulsatory flow through the artificial heart valves
 Klimeš, František ; Kořenář, Josef ; Toman, Jiří
Laser-Doppler anemometry (LDA) was used for velocity measurements downstream of various types of artificial heart valve prostheses. The velocity signals were subjected to analog signal processing prior to digital turbulence analysis. Obtained turbulent characteristics like Reynolds stersses and spectral density of energy are interesting from the point of blood hemolysis as well as for artificial valves design improvements.
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National Repository of Grey Literature : 14 records found   previous11 - 14  jump to record:
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