, Volume 34, Issue 1, pp 76-78
Date: 05 Feb 2011

Force acting on a nanoparticle in a fluid

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A force acting on a nanoparticle occurring in a fluid has been studied by the molecular dynamics method. It is shown that this force is nonstationary and exhibits a relaxation character. At the initial instant, it is two to three times the Stokes force, but then decreases and, outside the first relaxation region, becomes smaller than the Stokes force. A stationary force acting on a nanoparticle is determined by the particle mass and size. Correlation expressions for determining the drag coefficient are constructed. It is established that the drag force is anisotropic.

Original Russian Text © V.Ya. Rudyak, A.A. Belkin, E.A. Tomilina, 2008, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2008, Vol. 34, No. 2, pp. 69–74.