Chaplygin-Kármán-Tsien relation [chǝ`plē·gǝn ´kär´män `tsyen ri`lā·shǝn] FLUID MECHANICS The relation that in the case of isentropic flow of an ideal gas with negligible viscosity and thermal conductivity, the sum of the pressure and a constant times the reciprocal of the density of the fluid is constant along a streamline; a useful, although physically impossible, approximation. |