### Abstract

Drag and lift forces acting on a spherical droplet in a homogeneous linear shear flow were numerically studied by means of a three dimensional direct numerical simulation based on a marker and cell (MAC) method. The effects of fluid shear rate and particle Reynolds number on drag and lift forces acting on a spherical droplet were compared with those on a rigid sphere. The results show that the drag force acting on a spherical droplet in a linear shear flow increases with shear. The lift force acts on a droplet from high-speed side to low-speed side in the linear shear flow with high particle Reynolds number of R_{ep}≥100. The direction of the lift force is different between low and high particle Reynolds number flows. The behavior of the lift force on a droplet is quite similar to that on a rigid sphere, but the effects of fluid shear rate on the lift force acting on a spherical droplet in the linear shear flow become smaller than that acting on a rigid sphere in the low Reynolds number region of R_{ep}<10.

Original language | English |
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Pages (from-to) | 1519-1526 |

Number of pages | 8 |

Journal | Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B |

Volume | 71 |

Issue number | 706 |

DOIs | |

Publication status | Published - 2005 Jun |

### Keywords

- Drag and Lift Forces
- Flow Structure Outside and Inside a Droplet
- Numerical Simulation

### ASJC Scopus subject areas

- Condensed Matter Physics
- Mechanical Engineering

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## Cite this

*Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B*,

*71*(706), 1519-1526. https://doi.org/10.1299/kikaib.71.1519