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TWO-DIMENSIONAL HYDRODYNAMICS COMPUTER SIMULATION ON THE FORMATION OF TERRESTRIAL COMET TAIL DUE TO SOLAR WIND BLOWS

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Hydrodynamics pressure due to relative motion of the terrestrial comet when approaching the Sun is simulated in two-dimensional space. The ambient solar wind introduced relative momentum on the comet materials. The material evaporates and left behind the comet-head as a tail. Direction of the tail-vector always opposes to thedirection of motion if it is still far enough from the Sun. Before a tail is formed, it is obvious from our simulations that outer-most soft material will firstly dismantle and evaporate. The soft material is blown away and the tail is formed subsequently.
Keywords: Solar wind, hydrodynamic simulations, comet tail formation. Bambang Setiahadi Indonesian National Institute of Aeronautics and Space (LAPAN) Watukosek, Gempol, P.O. Box 04, Pasuruan 67155, East Java phone:0343851887,Fax:0343852311,HP:085648626737 e-mail: bsetiapx14@yahoo.co.id