In recent years, several investigations were carried out to study the characteristics of a novel heat transport mode in which heat is transported from a hot to a cold reservoir by means of sinusoidal oscillations of a viscous fluid contained within open-ended tubes connecting the reservoirs. It has been experimentally and analytically  confirmed that such periodic longitudinal oscillations result in a very significant enhancement in axial transport capability of the fluid.
S. P. Anjali Devi and Dr. Shailendhra K., “Heat transport along an oscillating flat plate in the presence of a transverse magnetic field”, International Journal of Heat and Mass Transfer, vol. 40, no. 2, pp. 498-501, 1997.