Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas
To exclude collisions leading to the overlap of finite-sized charged particles in molecular dynamics (MD) simulations in systems like complex (dusty) plasmas, we developed a scheme to generate a pair interaction force functionally depending on the pair distribution of particles. This ensures that th...
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| Language: | English |
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Elsevier
2025-02-01
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| Series: | Results in Physics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211379725000300 |
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| author | N. Kh. Bastykova N.E. Djienbekov T.S. Ramazanov S.K. Kodanova |
| author_facet | N. Kh. Bastykova N.E. Djienbekov T.S. Ramazanov S.K. Kodanova |
| author_sort | N. Kh. Bastykova |
| collection | DOAJ |
| description | To exclude collisions leading to the overlap of finite-sized charged particles in molecular dynamics (MD) simulations in systems like complex (dusty) plasmas, we developed a scheme to generate a pair interaction force functionally depending on the pair distribution of particles. This ensures that the pair distribution function drops to zero at distances between particles corresponding to the point where the surfaces of two particles come into contact. The presented model has a wide utility for the description of various processes in dusty plasmas. As an example, using the non-equilibrium MD method, we performed calculations of the shear viscosity and thermal conductivity of charged spherical particles interacting via screened Yukawa potential. The role of finite particle size was found to be particularly important for small values of the coupling parameter, i.e., for gas-like and weakly correlated liquid-like systems. Furthermore, we have analyzed the shear viscosity and thermal conductivity in the presence of an external uniform magnetic field. |
| format | Article |
| id | doaj-art-4aa9331dedef4da7aa83ea739609461b |
| institution | Kabale University |
| issn | 2211-3797 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Physics |
| spelling | doaj-art-4aa9331dedef4da7aa83ea739609461b2025-02-05T04:31:52ZengElsevierResults in Physics2211-37972025-02-0169108136Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmasN. Kh. Bastykova0N.E. Djienbekov1T.S. Ramazanov2S.K. Kodanova3Institute of Applied Sciences and IT, 280 Baizakov str., 050040 Almaty, Kazakhstan; Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi ave., 050040 Almaty, KazakhstanInstitute of Applied Sciences and IT, 280 Baizakov str., 050040 Almaty, Kazakhstan; Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi ave., 050040 Almaty, KazakhstanInstitute of Applied Sciences and IT, 280 Baizakov str., 050040 Almaty, Kazakhstan; Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi ave., 050040 Almaty, KazakhstanCorresponding author.; Institute of Applied Sciences and IT, 280 Baizakov str., 050040 Almaty, Kazakhstan; Institute for Experimental and Theoretical Physics, Al-Farabi Kazakh National University, 71 Al-Farabi ave., 050040 Almaty, KazakhstanTo exclude collisions leading to the overlap of finite-sized charged particles in molecular dynamics (MD) simulations in systems like complex (dusty) plasmas, we developed a scheme to generate a pair interaction force functionally depending on the pair distribution of particles. This ensures that the pair distribution function drops to zero at distances between particles corresponding to the point where the surfaces of two particles come into contact. The presented model has a wide utility for the description of various processes in dusty plasmas. As an example, using the non-equilibrium MD method, we performed calculations of the shear viscosity and thermal conductivity of charged spherical particles interacting via screened Yukawa potential. The role of finite particle size was found to be particularly important for small values of the coupling parameter, i.e., for gas-like and weakly correlated liquid-like systems. Furthermore, we have analyzed the shear viscosity and thermal conductivity in the presence of an external uniform magnetic field.http://www.sciencedirect.com/science/article/pii/S2211379725000300Complex plasmasDust particleShear viscosityThermal conductivityMolecular dynamics simulations |
| spellingShingle | N. Kh. Bastykova N.E. Djienbekov T.S. Ramazanov S.K. Kodanova Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas Results in Physics Complex plasmas Dust particle Shear viscosity Thermal conductivity Molecular dynamics simulations |
| title | Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas |
| title_full | Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas |
| title_fullStr | Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas |
| title_full_unstemmed | Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas |
| title_short | Force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas |
| title_sort | force fields for molecular dynamics simulations of charged dust particles with finite size in complex plasmas |
| topic | Complex plasmas Dust particle Shear viscosity Thermal conductivity Molecular dynamics simulations |
| url | http://www.sciencedirect.com/science/article/pii/S2211379725000300 |
| work_keys_str_mv | AT nkhbastykova forcefieldsformoleculardynamicssimulationsofchargeddustparticleswithfinitesizeincomplexplasmas AT nedjienbekov forcefieldsformoleculardynamicssimulationsofchargeddustparticleswithfinitesizeincomplexplasmas AT tsramazanov forcefieldsformoleculardynamicssimulationsofchargeddustparticleswithfinitesizeincomplexplasmas AT skkodanova forcefieldsformoleculardynamicssimulationsofchargeddustparticleswithfinitesizeincomplexplasmas |