Flow around fishlike shapes studied using multiparticle collision dynamics

Daniel A. P. Reid*, H. Hildenbrandt, J. T. Padding, C. K. Hemelrijk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)
132 Downloads (Pure)

Abstract

Empirical measurements of hydrodynamics of swimming fish are very difficult. Therefore, modeling studies may be of great benefit. Here, we investigate the suitability for such a study of a recently developed mesoscale method, namely, multiparticle collision dynamics. As a first step, we confine ourselves to investigations at intermediate Reynolds numbers of objects that are stiff. Due to the lack of empirical data on the hydrodynamics of stiff fishlike shapes we use a previously published numerical simulation of the shapes of a fish and a tadpole for comparison. Because the shape of a tadpole resembles that of a circle with an attached splitter plate, we exploit the knowledge on hydrodynamic consequences of such an attachment to test the model further and study the effects of splitter plates for objects of several shapes at several Reynolds numbers. Further, we measure the angles of separation of flow around a circular cylinder and make small adjustments to the boundary condition and the method to drive the flow. Our results correspond with empirical data and with results from other models.

Original languageEnglish
Article number046313
Number of pages7
JournalPhysical Review E
Volume79
Issue number4
DOIs
Publication statusPublished - Apr-2009

Keywords

  • external flows
  • hydrodynamics
  • LOW REYNOLDS-NUMBERS
  • CIRCULAR-CYLINDER
  • FLUID-DYNAMICS
  • SQUARE CYLINDER
  • LATTICE-GAS
  • HYDRODYNAMICS
  • WAKE
  • MODEL
  • SIMULATION

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