1 Foundation of Fluid Mechanics
9
Fig. 1.9 Particle marking method
connecting its spatial position at different times is called the pathline of the
particle (as shown in Fig. 1.10). The pathline equation can be expressed as
dx
u
=
dy
v
=
dz
w
= dt
Fig. 1.10 Traces of different fluid particles characterized by the Lagrangian method