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Search Term: tensor, 26 matches previous 1 2 3 Next * click term to see full definition alternating unit tensor—A mathematical function with symbol εijk defined to switch between the discrete values of +1, 0, and -1, depending on the values of the three indices i, j, and k: Cartesian tensor—A quantity specified by components that transform according to prescribed rules under rotations of (Cartesian) coordinate axes. correlation coefficient—1. See correlation. dissipation—(Also called viscous dissipation.) In thermodynamics, the conversion of kinetic energy into internal energy by work done against the viscous stresses. eddy-stress tensor—See Reynolds stresses, stress tensor. Einstein's summation notation—A special notation for writing vector equations using the scalar components of vectors rather than the vectors themselves. integral length scales—Of the three standard turbulence length scales, the ones that are measures of the largest separation distance over which components of the eddy velocities at two distinct points are correlated. inviscid fluid—(Also called ideal fluid, perfect fluid.) A nonviscous fluid, that is, a fluid for which all surface forces exerted on the boundaries of each small element of the fluid act normal to these boundaries. isotropic turbulence—Turbulence in which the products and squares of the velocity components and their derivatives are independent of direction, or, more precisely, invariant with respect to rotation and reflection of the coordinate axes in a coordinate system moving with the mean motion of the fluid. moment of inertia—For a system of point masses, the sum of the product of each mass and the square of its perpendicular (minimum) distance from a given axis.