Theoretical Estimation of Shear Rate during the Oral Phase of Swallowing: Effect of Partial Slip

摘要: The goal of this study was to quantify the shear rate in a simplified model oral cavity during bolus ejection. Parallel plate squeezing flow used approximate action tongue against palate as is ejected from mouth and into pharynx swallow. current work quantified variations with respect two main effects – relative degree boundary slip for Newtonian boluses varying viscosity. results suggest that single describes oropharyngeal swallowing too simplistic concept. Rather variation viscosity, level lubrication well others may have strong effect on rate. Practical Applications Mathematical modeling has potential play an important role understanding underlying mechanics normal abnormal swallowing, guiding development optimization therapeutic strategies disorders. long-term objective research develop robust methodology prediction characteristics response motions structures, such pharyngeal walls. In addition furthering our swallow, models could probe physical basis biomechanical treatment strategies, postural changes (e.g., chin-tuck) or dietary medications (commonly referred “thickened liquids”), optimizing suggesting new altogether.