Integral methods for describing pulsatile flow

David Hromadka, Hynek Chlup, Rudolf Žitný

Integral methods for describing pulsatile flow

Číslo: 2/2016
Periodikum: Acta Polytechnica
DOI: 10.14311/AP.2016.56.0099

Klíčová slova: pulsatile flow, integral energy, integral momentum, rigid pipe, Pulsní tok, integrální energie, integrální hybnost, tuhá trubka

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Anotace: This paper presents an approximate solution of the pulsatile flow of a Newtonian fluid in the laminar flow regime in a rigid tube of constant diameter. The model is represented by two ordinary differential equations. The first equation describes the time evolution of the total flow rate, and the

second equation characterizes the reverse flow near the wall. These equations are derived from the momentum balance equation and from the kinetic energy equation, respectively. The accuracy of the derived equations is compared with a solution in which the finite difference method is applied to a partial differential equation.