Related Experiment Video
Updated: Sep 9, 2025

Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
Published on: July 19, 2016
Effects of fluttering plaques on the pressure drop waveform of stenotic flow
1Department of Mechanical Engineering, Korea National University of Transportation (KNUT), Daehak-ro 50, Chungju-si, Chungcheongbuk-do, South Korea.
Abstract:
The morphological vulnerability of atherosclerotic plaques, such as fluttering motion under pulsatile flow, poses diagnostic challenges in conventional fractional flow reserve (FFR) assessment. In this study, we investigate the hemodynamic impact of a fluttering plaque using a physical model of mild (40%) stenosis with and without an elastic plaque under stenotic flow. High-speed particle image velocimetry (PIV) and differential pressure measurements were employed to characterize flow patterns and pressure drop waveforms. While both models produced comparable time-averaged pressure drops, the Fluttering Plaque model exhibited extended recirculation zones, and elevated root-mean-square (RMS) fluctuations in pressure drop waveforms. The effects of the fluttering plaque on the distribution of turbulent kinetic energy (TKE) provides insight into the observed results. Our findings suggest that waveform-derived metrics, particularly the RMS amplitude of pressure drop fluctuations, may serve as novel hemodynamic indicators for detecting vulnerable plaques that remain undetected by time-averaged indices such as FFR.
More Related Videos
09:36A Magnetic Resonance Imaging-based Computational Protocol for Analysis of Plaque Morphology and Hemodynamics in Patients with Carotid Artery Stenosis
Published on: August 12, 2025
13:07Optical Coherence Tomography Based Biomechanical Fluid-Structure Interaction Analysis of Coronary Atherosclerosis Progression
Published on: January 15, 2022
Related Concept Videos
Steady, Laminar Flow Between Parallel Plates
Fluid Pressure over Flat Plate of Variable Width
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
Static, Stagnation, Dynamic and Total Pressure
Fluid Pressure over Flat Plate of Constant Width
The resultant force...
Mitral Stenosis I: Introduction
Steady, Laminar Flow in Circular Tubes