| Parameters | Short description |
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| the operator of vector differentiation with respect to |
|
| the operator of vector differentiation with respect to |
| t | given time |
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| the time of the initial collision of the converging particle |
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| the ending point of the converging particle |
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| the starting point of the converging particle |
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| mass flow velocity in the point |
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| the thermal velocity of converging particle in point |
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| rate of collisions per unit volume at |
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| the velocity vector of the converging particle in the ending point |
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| probability of free path traveling along the ballistic trajectory of the converging ballistic trajectory starting at time |
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| property content delivered by the converging ballistic particle in the ending point |
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| traveling time between an initial and ending consecutive collisions or the ballistic traveling time |
| n | gas particles density |
| m | gas particle mass |
|
| the effective particle’s cross-section of collisions |
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| number of particles placed within a collision tube of a unit length |
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| the cross-section of collisions |
| V | the volume of integration over space occupied by the gas |
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| the external force that applies to a particle of a unit mass |
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| the average velocity of the traveling particle with respect to a nearby passed particle |