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Comet quasi bound state dust dynamics modeling method considering ice content

A technique of dynamic modeling and dynamic equations, applied in the field of dynamic modeling of comet quasi-bound dust, which can solve problems such as the inability to describe the movement of quasi-bound dust

Pending Publication Date: 2022-03-08
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional research methods mostly use simplified dynamic models of escaped dust, which cannot describe the motion of quasi-bound dust

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  • Comet quasi bound state dust dynamics modeling method considering ice content
  • Comet quasi bound state dust dynamics modeling method considering ice content
  • Comet quasi bound state dust dynamics modeling method considering ice content

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Embodiment Construction

[0037] Below in conjunction with accompanying drawing and the dynamic simulation embodiment to comet 103P / Hartley 2, the present invention will be further described, but present embodiment is not intended to limit the present invention, and all adopt similar method of the present invention and similar variation thereof, all should list protection scope of the present invention.

[0038] Simplification assumes that the comet nucleus and dust are spherical; assumes that there is no interaction between the dust, and ignores the collision and adhesion between the dust.

[0039] On the premise of the above assumptions, the establishment of the dynamic model of quasi-bound dust includes the following three steps:

[0040] Step 1: Build a comet nucleus / dust surface temperature model

[0041] The comet nucleus / dust temperature model reflects the temperature at any point on the dust surface. The radiation energy of the comet nucleus / dust surface includes two parts: the radiation ener...

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Abstract

The invention relates to a comet quasi bound state dust dynamics modeling method considering ice content. According to the method, a comet dust dynamic model is established according to comet nucleus gravitation, solar gravitation, sunlight pressure, gas acting force and sublimation recoil force, a dust surface ice coverage rate coefficient is introduced, and the analysis of the content of the dust surface ice can be realized, specifically, the method comprises the following steps: step 1, establishing a dust surface temperature model; 2, establishing a comet orbital coordinate system; and 3, establishing a quasi bound state dust kinetic equation. According to the method, on the basis of the escape-state dust kinetic model, the gas acting force and the sublimation recoil force are additionally considered, the quasi-bound-state dust kinetic model is established, and the movement of the quasi-bound-state dust can be solved through the model. And meanwhile, the dust surface ice coverage rate determines the sublimation recoil force suffered by the dust, so that the solution of the model can reflect the ice content of the dust.

Description

technical field [0001] The invention relates to a method for modeling comet quasi-bound dust dynamics considering ice content. This method establishes a comet dust dynamic model based on comet nucleus gravity, solar gravity, solar light pressure, gas force and sublimation recoil force, and introduces the ice coverage coefficient on the dust surface, which can realize the analysis of the ice content on the dust surface, which belongs to the field of astronomy . Background technique [0002] Comets are small solar system bodies from the Oort cloud in the outer solar system. Due to the small size of the comet nucleus, its loose structure and low internal gravity, there is no significant geological activity, so its internal structure and composition can be preserved for a long time. Because the orbital eccentricity of comets is generally large, comets have been in an environment of low solar radiation for a long time, and the surface materials of comet nuclei also retain the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F119/14
CPCG06F30/20G06F2119/14
Inventor 王晓慧刘建岑岳宇贤
Owner BEIHANG UNIV