Modelagem hidrodinamica de um mecanismo pulso duplicador

AUTOR(ES)
DATA DE PUBLICAÇÃO

1994

RESUMO

Pulse duplicators simulators are useful devices in biomedical applications. They can simulate in vitro flow phenomena related to arterial blood flow such as: stenosis, aneurysms, bifurcations, vessel elasticity among others. The purpose of this work is two-fold: develop mathematicaltools to model and analyze pulse duplicators simulators and the propose a new conceptual design of pulse duplicator. The one-dimensional mathematical model is founded on the conservations equations of mass, momentum and energy. A scale analysisis performed on the system rendering the equations in dimensionless form plus dimensional groups representing geometric and dynamic flow parameters. The solution is obtained by means of two methods: one analytical approximated method with the use of perturbation theory and the other a numericalmethod developed in the Mathematicaâ. The mathematicaltools were applied to analyzethe dynamicbehavior of a new valveless pulse duplicator designoThe pulse duplicator concept relies on the decomposition of a given waveform in twO components: DC and AC levels which represent, respectively, the waveform time average and fluctuatingcomponents. The waveformDC component is supplied by a constant head tank while the AC component is given by a reciprocating piston pump controlled by a computer

ASSUNTO(S)

escoamento pulsatil ultra-sonografia doppler perturbação (matematica)

ACESSO AO ARTIGO

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