Estimation of pulsatile energy dissipation in intersecting pipe junctions using inflow pulsatility indices

摘要: This study aims to characterize the effect of inflow pulsatility on hydrodynamic power loss inside intersecting double-inlet, double-outlet pipe intersection (DIPI) with cross-flow mixing. An extensive set computational fluid dynamics (CFD) simulations was performed in order identify individual effects flow parameters, i.e., amplitude, frequency, and relative phase shift between waveform oscillations, loss. experimentally validated second accurate solver is employed this study. To predict pulsatile performance any given arbitrary waveforms, we proposed three easy-to-calculate indices. The frequency-coupled quasi-steady theory incorporated functional form as a function these Our results indicated that within branch sections, lumped outflow-junction section, whole conduit correlates strongly each waveform, total pulsatility, frequency content, respectively. complete CFD simulation matrix provided unified analytical expression predicts one-degree offset DIPI geometry. predictive accuracy evaluated comparison evaluation multi-harmonic waveforms. These have important implications networks employ complex junctions well patient-to-patient surgically created vascular connections. Coupling present non-dimensional steady formulation valuable tool estimate energy dissipation for junction geometry minimum use costly computations.