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Welcome to KAPSEL Homepage

= Open Software for Direct Numerical Simulations of Particle Dispersions =

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What is KAPSEL?

  • KAPSEL means "Kyoto Advanced Particle Simulator for Electro-hydrodynamics" based on a direct numerical simulation method for colloidal dispersions called SPM (Smoothed Profile Method). KAPSEL is designed to simulate dynamics of solid particles dispersed in simple and complex fluids. KAPSEL enables us to simulate complex rheological properties of colloidal dispersions, electrophoresis of charged colloids, etc.
  • KAPSEL-2 is the latest version of KAPSEL. It can introduce thermal fluctuations to the system and also perform rheology simulations under steady or oscillatory shear flow being fully compatible with usual periodic boundary condition. Computational efficiency is also much improved from the original version so that one can simulate larger systems.


  • KAPSEL-2
    • [30 Mar 2011] KAPSEL-2.10 release (newly implemented the Lees-Edwards sheared periodic boundary condition)
  • [19 Aug 2009] KAPSEL-2.00 release
  • [04 Aug 2009] KAPSEL-2.beta pre-release
  • [31 May 2006] KAPSEL released.

Related Papers

  • Simulation method & algorithm
    • Yasuya Nakayama, Kang Kim and Ryoichi Yamamoto, "Simulating (electro) hydrodynamic effects in colloidal dispersions: smoothed profile method",
      Eur. Phys. J. E, 26, 361-368 (2008).
  • H. Kobayashi and R. Yamamoto, "Implementation of Lees-Edwards periodic boundary conditions for direct numerical simulations of particle dispersions under shear flow",
    J. Chem. Phys., 134, 064110 (2011) "doi>"
  • Saeed Jafari, Ryoichi Yamamoto, and Mohamad Rahnama "Lattice-Boltzmann method combined with smoothed-profile method for particulate suspensions",
    Phys. Rev. E, 83, 026702 (2011) "doi>"