EU to force firms to reveal tre owners in wake of Panama Papers wake the region of recirculating flow immediately behind a moving or stationary blunt body, caused by viscosity, which may be accompanied by flow separation and turbulence, or stationary the wave pattern on the water surface downstream of an object in a flow, or produced by a moving object (e.g. a ship), caused by pressure differences of the fluids above and below the free surface and gravity (or surface tension), or both.