Thermodynamic analysis of the squid mantle muscles and giant axon during slow swimming and jet escape propulsion

Yalçınkaya, Bahar Hazal, Erikli, Şükrü, Özilgen, Burak Arda, Olcay, Ali Bahadır, Sorgüven, Esra and Özilgen, Mustafa (2016) Thermodynamic analysis of the squid mantle muscles and giant axon during slow swimming and jet escape propulsion. Energy, 102. pp. 537-549. ISSN 0360-5442

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Abstract

Squids have two substantially different types of muscle fibers: superficial mitochondria rich fibers, which
perform aerobic respiration during slow swimming, and central mitochondria poor fibers, which perform
anaerobic respiration during jet escape. A detailed thermodynamic analysis shows that during slow
swimming, 3.82 J/(kg s) of chemical exergy is consumed, and a total muscle work of 0.28 J/(kg s) is
produced. 0.27 J/(kg s) of this is produced by the fin to generate lift, and the rest by the mantle volume
contraction. During the jet escape at a speed of 3 mantle length/s, squid consumes an exergy of 9.97 J/
(kg s) and produces a muscle work of 0.16 J/(kg s). Exergy destruction rates during slow swimming and
jet escape modes are 3.54 and 9.81 J/(kg s), respectively. Exergy destroyed because of the action potential
propagation in the squid giant axon is calculated as 0.03 and 0.10 J/(kg s) for the slow and fast swimming
modes, respectively.

Item Type: Article
Keywords: Squid Jet escape Slow swimming Thermodynamic efficiency Muscle Giant axon
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Research Centres and Groups: Thermo-Fluid Mechanics Research Centre
Subjects: Q Science > QC Physics > QC0251 Heat > QC0310.15 Thermodynamics
Depositing User: Esra Sorguven Oner
Date Deposited: 17 Jan 2017 14:47
Last Modified: 08 Mar 2017 06:10
URI: http://sro.sussex.ac.uk/id/eprint/66307

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