Header

  1. View current page

    수학이 알고싶은 중고대딩들을 위한 수학 노트

코테베그-드 브리스 방정식(KdV equation)

이 항목의 스프링노트 원문주소

 

 

개요
  • any localized nonlinear wave which interacts with another (arbitrary) local disturbance and always regains asymptotically its exact initial shape and velocity (allowing for a possible phase shift)
  • Solitons were discovered experimentally (Russell 1844)
  • analytically (Korteweg & de Vries, 1895)

    • modelling of Russell's discovery
    • 1-soliton solution
  • numerically (Zabusky & Kruskal 1965).

    • interaction of two 1-soliton solutions
    • they discovered that solitons of different sizes interact cleanly

 

 

러셀(John Scott Russell)의 관찰 
  • Using a wave tank, he demonstrated four facts

    • First, solitary waves have a hyperbolic secant shape.
    • Second, a sufficiently large initial mass of water produces two or more independent solitary waves.
    • Third, solitary waves cross each other “without change of any kind.”
    • Finally, a wave of height h and traveling in a channel of depth d has a velocity given by the expression (where g is the acceleration of gravity), implying that a large amplitude solitary wave travels faster than one of low amplitude.

 

 

 

코테베그-드 브리스 방정식 (KdV equation)
  • u_{xxx}=u_t+6uu_x
  • 1-soliton 해의 유도

u(x,t)=f(x-ct)로 두자.

f'''= 6ff'-cf'

f''=3f^2-cf+b

f''f'=(3f^2-cf+b)f'

\frac{1}{2}(f')^2=f^3-\frac{c}{2}f^2+bf+a

 

 

역사

 

 

메모

 

 

관련된 항목들

 

 

수학용어번역

 

 

사전 형태의 자료

 

 

리뷰

 

 

 

History

Last edited on 01/14/2012 02:15 by 피타고라스

Comments (0)

You must log in to leave a comment. Please sign in.