Comput Math Methods Med - Mathematical analysis of non-Newtonian blood flow in stenosis narrow arteries.

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Resumo

The flow of blood in narrow arteries with bell-shaped mild stenosis is investigated that treats blood as non-Newtonian fluid by using the K-L model. When skin friction and resistance of blood flow are normalized with respect to non-Newtonian blood in normal artery, the results present the effect of stenosis length. When skin friction and resistance of blood flow are normalized with respect to Newtonian blood in stenosis artery, the results present the effect of non-Newtonian blood. The effect of stenosis length and effect of non-Newtonian fluid on skin friction are consistent with the Casson model in which the skin friction increases with the increase of either stenosis length or the yield stress but the skin friction decreases with the increase of plasma viscosity coefficient. The effect of stenosis length and effect of non-Newtonian fluid on resistance of blood flow are contradictory. The resistance of blood flow (when normalized by non-Newtonian blood in normal artery) increases when either the plasma viscosity coefficient or the yield stress increases, but it decreases with the increase of stenosis length. The resistance of blood flow (when normalized by Newtonian blood in stenosis artery) decreases when either the plasma viscosity coefficient or the yield stress increases, but it decreases with the increase of stenosis length.

Resumo Limpo

flow blood narrow arteri bellshap mild stenosi investig treat blood nonnewtonian fluid use kl model skin friction resist blood flow normal respect nonnewtonian blood normal arteri result present effect stenosi length skin friction resist blood flow normal respect newtonian blood stenosi arteri result present effect nonnewtonian blood effect stenosi length effect nonnewtonian fluid skin friction consist casson model skin friction increas increas either stenosi length yield stress skin friction decreas increas plasma viscos coeffici effect stenosi length effect nonnewtonian fluid resist blood flow contradictori resist blood flow normal nonnewtonian blood normal arteri increas either plasma viscos coeffici yield stress increas decreas increas stenosi length resist blood flow normal newtonian blood stenosi arteri decreas either plasma viscos coeffici yield stress increas decreas increas stenosi length

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