Oral cavity flow distribution and pressure drop in balaenid whales feeding: a theoretical analysis.

摘要: Balaenid whales, as continuous ram filter feeders, can efficiently separate prey from water by baleen. The feeding process of balaenid whales is extremely complex, in which the flow distribution and pressure drop oral cavity play a significant role. In this paper, theoretical model coupled with velocity established based on mass conservation, momentum conservation equations, considering both inertial friction terms. A discrete method section-by-section calculation adopted to solve model. effects four crucial parameters, i.e., ratio filtration area inlet (S), Reynolds number entrance (Rein ), thickness permeability porous media formed fringe layer () width anteroposterior canal within mouth along tongue (APT channel) that lip (APL (H) are discussed. results show that, for give case, increasing trends direction. For different cases, when S small, Rein small large, good pattern emerges smoother speed near oropharynx, better drainage, shunting filtration, higher energy efficiency. However, smaller values H, some efficiency sacrificed achieve additional average transverse order produce filtration. research paper provides reference design high-efficiency bionic filters.