Steady and Nonsteady State In Detonation

Detonation, Steady and Nonsteady State in (Steady Flaw or Streamline Flow and Nonsteady State in). This is the case when every particle that flows past a fixed point in space will have the same q, p and P at that point independent of time. In this condition, every point of the fluid continuum has a corresponding fluid velocity vector q. The term streamlines signifies a family of curves which are everyr where tangent to q thus, the direction of each streamline is everywhere that of the motion of the fluid 

In unsteady flows, the streamline pattern changes from instant to instant. In steadyr state flux the streamlines are constant in time and also represent the path lines, the trajectories of the fluid particles (Ref 1, p 18) 

Evans St Ablow (Ref 2) defined the steady-flow as a flow in which all partial derivatives with.respect to time are equal to zero . The five equations listed in their, paper (p 131), together with. appropriate initial and boundary conditions, are sufficient to solve for the dependent variables q (material or particle velocity factor), P (pressure), p (density), e (specific internal energy) and s (specific entropy) in regions which.are free of discontinuities. When dissipative irreversible effects are present, appropriate additional terms are required in the equations 

A steady flow can be subsonic, son ic or supersonic at a point as the magnitude of flow velocity q at that point is less than, equal to, or greater than the sound velocity c at that point, in the particular coordinate system being used 

Addnl information on unsteady flow is given in Refs 3 8t 4 Note 1 Dunkle (Ref 1, p 259) remarked that the term uniform can be.used instead of steady  

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