Fluid–Structure Interaction Modeling Applied to Peristaltic Pump Flow Simulations

Abstract

In this study, fluid–structure interaction (FSI) modeling was applied for predicting the fluid flow in a specific peristaltic pump, composed of one metallic roller and a hyperelastic tube pumping a viscous Newtonian fluid. Hyperelastic material dynamics and turbulence flow dynamics were coupled in order to describe all the physics of the pump. The commercial finite element software ABAQUS 6.14 was used to investigate the performance of the pump with a 3D transient model. By using this model, it was possible to predict the von Mises stresses in the tube and flow fluctuations. The peristaltic pump generated high pressure and flow pulses due to the interaction between the roller and the tube. The squeezing and relaxing of the tube during the operative phase allowed the liquid to have a pulsatile behavior. Numerical simulation data results were compared with one cycle pressure measurement obtained from pump test loop data, and the maximum difference between real and simulated data was less than 5%. The applicability of FSI modeling for geometric optimization of pump housing was also discussed in order to prevent roller and hose parts pressure peaks. The model allowed to investigate the effect of pump design variations such as tube occlusion, tube diameter, and roller speed on the flow rate, flow fluctuations, and stress state in the tube.

Phase-reduction for synchronization of oscillating flow by perturbation on surrounding structure

“…The dynamics is governed by where , , , and represent structure density, displacement, mass damping coefficient, stiffness damping coefficient and the first Piola–Kirchoff stress tensor (Formato et al. 2019). The stress tensor is characterized by Young's modulus and Poisson's ratio of the structure material according to Hooke's law.…”

A Soft Sensor for Estimation of In-Flow Rate in a Flow Process Using Pole Placement and Kalman Filter Methods

“…In reference [27], a method for measurement of flow velocity using a polyvinylidene fluoride as a piezoelectric film is stated. Estimation of fluid flow through pump was discussed in reference [28] through modeling of pump. Fluid-structure interaction method was used for modeling of the pump.…”

Optimal Design in Roller Pump System Applications for Linear Infusion

“…Additionally, the numerical simulations by Krautbauer et al [20], based on the structural and fluid flow model for mechanically driven peristaltic pumping, yielded stresses and mechanical deflections, allowing the design of wall-driven peristaltic pumps with application to therapeutic drug delivery. In 2019, Formato et al [21] applied FSI modeling for treating peristaltic roller pumping flow simulations, where the compression reduced the internal diameter of the pipe for about 87%, but not the necessary 100% for deep occlusion. All numerical studies have been designed to minimize the backflow, approaching occlusion with high amplitude tube compression and not to eliminate it, applying deep occlusion, namely, 100% amplitude tube compression.…”