Buchumschlag

Flow Induced by Collective Vertical Migration: Impact of Swimmer Distribution, Buoyancy, and Wake Interactions

Gespeichert in:
Veröffentlicht in:ProQuest Dissertations and Theses (2025)
1. Verfasser: Mohebbi, Nina
Veröffentlicht:
ProQuest Dissertations & Theses
Schlagworte:
Flashlights
Boxes
Distribution centers
Statistical significance
Flow velocity
Lasers
Swimming
Normal distribution
Salinity
Behavioral sciences
Animal sciences
Online-Zugang:Citation/Abstract
Full Text - PDF
Full text outside of ProQuest
Tags: Tag hinzufügen
Keine Tags, Fügen Sie das erste Tag hinzu!

MARC

LEADER 00000nab a2200000uu 4500
001 3255198748
003 UK-CbPIL
020 |a 9798290652504 
024 7 |a 10.7907/hz5j-g795  |2 doi 
035 |a 3255198748 
045 2 |b d20250101  |b d20251231 
084 |a 66569  |2 nlm 
100 1 |a Mohebbi, Nina 
245 1 |a Flow Induced by Collective Vertical Migration: Impact of Swimmer Distribution, Buoyancy, and Wake Interactions 
260 |b ProQuest Dissertations & Theses  |c 2025 
513 |a Dissertation/Thesis 
520 3 |a Various animal species exhibit collective motion, characterized by coordinated movement within groups of organisms. A prominent oceanic example is diel vertical migration (DVM), wherein zooplankton migrate vertically from deeper waters during the day to shallower regions at night, often covering distances of approximately 1 kilometer. Despite numerous field measurements, laboratory observations, and theoretical studies of biogenic mixing resulting from collective swimming, the scale of fluid mixing induced by DVM remains unresolved. A key challenge is linking the behavior and flows created by large numbers of individual organisms to collective-scale fluid dynamics. Since most swimmers involved in DVM operate at intermediate Reynolds numbers, the dynamics of these systems are nonlinear and span a wide range of spatial and temporal scales.This thesis investigates the scaling of flows generated by vertical migration of brine shrimp (Artemia salina) aggregates and parameterizes them through a combination of laboratory measurements and semi-analytical modeling. First, a volumetric, laser scanning system measured swimmer behaviors and flow interactions during vertical migrations induced in a laboratory setting. Swimmers demonstrated consistent vertical swimming velocities in varying environmental conditions and exhibited a Gaussian distribution within the tank cross-section while displaying a tendency to move inward toward the center of the tank, where illumination was brightest. A scaling relationship between swimmer buoyancy, ascent speeds, and the resulting flow speed was developed to contextualize these results. Finally, a semi-analytical model was developed to estimate the flow generated by the wakes of multiple swimmers in proximity. The behaviors of individual swimmers were informed by the empirical results of the previous section and superposed using an iterative method that conserves mass and momentum to solve for the aggregation-scale flow. Numerical results suggested that the induced flow upstream in the aggregation was insensitive to the presence of downstream swimmers, the average flow speed tended to reach a plateau beyond a threshold aggregation length, and that closer swimmer spacing led to higher induced flow speeds. 
653 |a Flashlights 
653 |a Boxes 
653 |a Distribution centers 
653 |a Statistical significance 
653 |a Flow velocity 
653 |a Lasers 
653 |a Swimming 
653 |a Normal distribution 
653 |a Salinity 
653 |a Behavioral sciences 
653 |a Animal sciences 
773 0 |t ProQuest Dissertations and Theses  |g (2025) 
786 0 |d ProQuest  |t Publicly Available Content Database 
856 4 1 |3 Citation/Abstract  |u https://www.proquest.com/docview/3255198748/abstract/embedded/75I98GEZK8WCJMPQ?source=fedsrch 
856 4 0 |3 Full Text - PDF  |u https://www.proquest.com/docview/3255198748/fulltextPDF/embedded/75I98GEZK8WCJMPQ?source=fedsrch 
856 4 0 |3 Full text outside of ProQuest  |u https://resolver.caltech.edu/CaltechTHESIS:05082025-223940273