Calculating Diffusion Speed from Gas to Vacuum: How Do You Do It?

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SUMMARY

The discussion focuses on calculating the diffusion speed of gas into a vacuum, specifically using Fick's Law as a foundational principle. The user seeks to understand how to determine the density evolution of gas over time after a bullet passes through it. Key concepts include diffusion speed and the impact of a bullet's passage on gas density. The conversation emphasizes the importance of mathematical modeling in understanding these phenomena.

PREREQUISITES
  • Fick's Law of Diffusion
  • Basic principles of gas dynamics
  • Mathematical modeling techniques
  • Understanding of density and pressure relationships in gases
NEXT STEPS
  • Research Fick's Law and its applications in diffusion calculations
  • Explore gas dynamics and its effects on diffusion processes
  • Study mathematical modeling of density changes over time
  • Investigate the impact of external forces, such as a bullet, on gas behavior
USEFUL FOR

Physicists, engineers, and researchers interested in gas dynamics, diffusion processes, and the effects of rapid disturbances in gas density.

zhaoxh
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Hi everyone,
I'd like to ask you a question. How to calculate the diffusion speed from a bulk of gas with density of n to vacuum? Thank you!
 
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I would start with Fick's Law.
 
What is diffusion speed?
 
Dickfore said:
What is diffusion speed?


actually, I want to consider the follow case. Consider that a bullet crosses a bulk of gas (desity=n), how to calculate the density evolution (with time) within the channel after the bullet goes through the gas.
 

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