Application of inertia-induced excitation theory for nonlinear acoustic modes in colloidal plasma equilibrium flow |
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Authors: | P K Karmakar |
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Institution: | (1) Department of Physics, Tezpur University, Napaam, Tezpur, 784 028, India |
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Abstract: | Application of inertia-induced acoustic excitation theory offers a new resonant excitation source channel of acoustic turbulence
in the transonic domain of plasma flow. In bi-ion plasmas like colloidal plasma, two well-defined transonic points exist corresponding
to the parent ion and the dust grain-associated acoustic modes. As usual, the modified ion acoustic mode (also known as dust
ion-acoustic (DIA) wave) dynamics associated with parent ion inertia is excitable for both nanoscale-and micronscale-sized
dust grains. It is found that the so-called (ion) acoustic mode (also known as dust-acoustic (DA) wave) associated with nanoscale
dust grain inertia is indeed resonantly excitable through the active role of weak but finite parent ion inertia. It is interestingly
conjectured that the same excitation physics, as in the case of normal plasma sound mode, operates through the active inertial
role of plasma thermal species. Details of the nonlinear acoustic mode analyses of current interest in transonic domains of
such impure plasmas in hydrodynamic flow are presented.
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Keywords: | Dust-acoustic (DA) wave dust ion-acoustic (DIA) wave constant dust charge model d-KdV equation colloidal plasma fluids dusty plasma complex plasma transonic plasma fluid acoustic modes acoustic turbulence acoustic fluctuations |
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