Počet záznamů: 1  

Reynolds stress in pulsatile flow

  1. 1.
    0196186 - UH-J 20013114 RIV AT eng C - Konferenční příspěvek (zahraniční konf.)
    Adamec, J. - Nožička, J. - Kořenář, Josef
    Reynolds stress in pulsatile flow.
    18th Danubia-Adria Symposium on Experimental Methods in Solid Mechanics. Steyr: Oesterr. Ingenieur und Architekten Verein, 2001, s. 135-136.
    [Danubia-Adria Symposium on Experimental Methods in Solid Mechanics /18./. Steyr (AT), 26.09.2001-29.09.2001]
    Výzkumný záměr: CEZ:AV0Z2060917
    Klíčová slova: pulsatile flow * laminar-turbulent transition * reynolds normal stress
    Kód oboru RIV: BK - Mechanika tekutin

    Studies of the cardiovascular system are increasingly focused on the mechanical properties of blood vessel walls. To determine the mechanical properties of the artery system it is necessary to determine their dependence on hemodynamical parameters of pulsatile flow. This is possible mainly in the experimental way. The achieved results could be applied in the wide field of diagnostics. The first step in this respect was the research of pulsatile flow in a rigid tube. the results that were acquired in the respect of transition into turbulence, Reynolds stresses and pressure losses will be the basis of further research. The experimental investigation of pulsatile Newtonian fluid flow in circular rigid pipes was performed by the authors. The aim of the research was to deepen the knowledge of impact of geometry and flow parameters on origination and development of Reynolds stress and on the value of energy loss during pulsatile flow. Knowledge of origination and development of turbulent disturbances helps us to create an image of transformation of flow into turbulence. The evaluation of the Reynolds normal turbulent stress help us to determine the values of Reynolds tangential stress, which causes hydraulic loss in the tubes, and knowledge of which can save remarkable energetic values. In hemodynamics the Reynolds tangential stress is of great importance for possible damage of blood elements and the inner surface of blood vessels.
    Trvalý link: http://hdl.handle.net/11104/0091827

     
     

Počet záznamů: 1  

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