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Effects of Vortical Flows on Hydrodynamics of Boxfish

Oloumi Yazdi, Mohammad Hassan | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46666 (08)
  4. University: Sharif University Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Abbaspour Tehranifard, Madjid; Rad, Manoochehr
  7. Abstract:
  8. In recent decades, bio-inspired design has become a common approach among engineers. Research and study of biological systems show that these systems are very efficient and consume the least amount of energy in a definite process. Specifically, marine mammals and fishes are great sources of inspiration. As an example, recently vertical axis wind turbine farms have been designed and constructed inspired by schools of fish, to produce more electricity. Boxfishes (Teleostei: Ostraciidae) are known for their hydrodynamic stability and relatively low drag coefficient. Highly maneuverable underwater robots have been designed according to morphology of boxfishes. Furthermore, Mercedes-Benz has designed a low drag coefficient bionic car that is inspired from yellow boxfish.
    In current study, hydrodynamics of yellow boxfish has been investigated numerically. The role of the bony carapace on development of spiral flows and self-correcting forces and moments has been studied. Inspired from morphology of yellow boxfish and its hydrodynamics, an underwater vehicle has been designed that is highly maneuverable in tight spaces. The effect of ventral keels has been augmented. Self-correcting forces are exerted on the body in different pitch angles and the restoring moment is in favorable direction
  9. Keywords:
  10. Hydrodynamics ; Vortex Flow (Eddy Current) ; Underwater Vehicle ; Box Fish ; Bioinspired Design

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