Development of smoothed particle hydrodynamics method for modeling active nematics

Saghatchi, Roozbeh and Kolukısa, Deniz Can and Yıldız, Mehmet (2023) Development of smoothed particle hydrodynamics method for modeling active nematics. International Journal for Numerical Methods in Engineering, 124 (1). pp. 159-182. ISSN 0029-5981 (Print) 1097-0207 (Online)

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This article proposes a novel graphics processing unit-based active nematic flow solver based on the smoothed particle hydrodynamics (SPH) method. Nematohydrodynamics equations are discretized using the SPH algorithm. Flow behavior, nematic ordering, topological defects, and vorticity correlation are calculated and discussed in detail. The spectrum of the kinetic energy with respect to the wavenumber is calculated at high particle resolution, and its slope at the different length scales is discussed. To exploit the SPH capabilities, pathlines of nematic particles are evaluated during the simulation. Finally, the mixing behavior of the active nematics is calculated as well and described qualitatively. The effects of two important parameters, namely, activity and elastic constant are investigated. It is shown that the activity intensifies the chaotic mixing nature of the active nematics, while the elastic constant behaves oppositely.
Item Type: Article
Uncontrolled Keywords: active nematics; kinetic energy spectrum; mixing; smoothed particle hydrodynamics; topological defects
Divisions: Faculty of Engineering and Natural Sciences
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Roozbeh Saghatchi
Date Deposited: 16 Jan 2023 12:25
Last Modified: 16 Jan 2023 12:25

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