## Abstract

There are two types of degrees of freedom of a random process. In this paper two types of characteristic frequency of turbulence were derived from the idea of the degrees of freedom. They were named the first characteristic frequency, K//1, and the second characteristic frequency, K//2. K//1 corresponds to the integral time scale of turbulence and K//2 can be regarded as a randomness factor of turbulence. K//1 and K//2 of the turbulence measured in the center of the canine ascending aorta were discussed. It was shown that K//2 was larger than K//1. It was found that K//2 was well correlated to the reciprocal of Strouhal number, but K//1 was not. So, it is suggested that the randomness of the aortic turbulence depends on the Strouhal number, but the integral time scale of the aortic turbulence does not.

Original language | English |
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Pages (from-to) | 158-159 |

Number of pages | 2 |

Journal | japanese journal of medical electronics and biological engineering |

Volume | 22 |

Publication status | Published - 1984 Apr 1 |

## ASJC Scopus subject areas

- Biomedical Engineering