﻿ Calculation of Blast wave：Radius and Expanding velocity

# Calculation of Blast wave：Radius and Expanding velocity

 1 Dimensionless constant：ζ0 - 2 Initial energy：E0 *10^J - 3 Age：t s - 4 Surrounding medium density：ρ0 kg/m^3 - 5 Graph t(s)- R(m) t(s)- D(m/s) Plot Input Data： YesNo , Figure： OnOff
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## LaTex

$R=\xi _{0}(\frac{E_{0}}{\rho _{0}})^{1/5}t^{2/5},\, D=\frac{2}{5}\xi _{0}(\frac{E_{0}}{\rho _{0}})^{1/5}t^{-3/5}$

## Keyword

Blast wave,Radius,Expanding velocity,Dimensionless constant,Initial energy,Age,Surrounding medium density

## Reference

[1]：Graham Woan著・堤正義訳：『ケンブリッジ物理公式ハンドブック』,共立出版,p.85,2007.
[2]：The formation of a blast wave by a very intense explosion
[3]：Supernova Remnant
[4]：Blast wave

## Remarks

・ζ0：『a function of the ratio of the specific heat of air at constant pressure to the specific heat of air at constant volume』Ref.[4]
・E0：Initial energy
・t：Age
・ρ0：Surrounding medium density
・r：Radius of the blast wave
・D：Expanding velocity
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