Dust-acoustic shocks in strongly coupled dusty plasmas.
Electrostatic dust-acoustic shock waves are investigated in a viscous, complex plasma consisting of dust particles, electrons, and ions. The system is modelled using the generalized hydrodynamic equations, with strong coupling between the dust particles being accounted for by employing the effective electrostatic temperature approach. Using a reductive perturbation method, it is demonstrated that this model predicts the existence of weakly nonlinear dust-acoustic shock waves, arising as solutions to Burgers's equation, in which the nonlinear forces are balanced by dissipative forces, in this case, associated with viscosity. The evolution and stability of dust-acoustic shocks is investigated via a series of numerical simulations, which confirms our analytical predictions on the shock characteristics.
Centre for Plasma Physics, Department of Physics and Astronomy, Queen's University Belfast, BT7 1NN Northern Ireland, United Kingdom.
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Cousens
Deutsches GeoForschungsZentrum, GFZ, 14473 Potsdam, Germany.
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Yaroshenko
Department of Physics, Jahangirnagar University, Dhaka-1342, Bangladesh.
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Sultana
School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa.
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Hellberg
School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa and Sterrenkundig Observatorium, Universiteit Gent, Krijgslaan 281, B-9000 Gent, Belgium.
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Verheest
Centre for Plasma Physics, Department of Physics and Astronomy, Queen's University Belfast, BT7 1NN Northern Ireland, United Kingdom.
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Kourakis