This equation is called the continuity equation for steady one-dimensional flow ... but if they follow different paths (unsteady flow), it is possible for the line to cross over itself. In unsteady ...

Standard time-marching compressible flow solvers used extensively in the aerospace industry cannot be applied incompressible flows, as the governing equations lack a time derivative in the continuity ...

This equation is called the continuity equation for steady one-dimensional flow ... but if they follow different paths (unsteady flow), it is possible for the line to cross over itself. In unsteady ...