Abstract: A heat exchange device is provided for use as a cross flow heat exchanger, preferably for use as a liquid-liquid cross flow exchanger, having a stack of thin metallic plates having channel walls for defining channels for cold and hot fluid flow paths traversing therethrough on opposite sides of the plates. Improved heat transfer coefficients and heat transfer rates are attained by providing oscillators for inducing oscillation and turbulence in the fluids as they are passed from inlet to outlet chambers through their respective channels.

Abstract: A system for separating gases of differing masses by enhanced diffusion comprising a gas separating device which consists of a pair of gas reservoirs, at least one duct connecting the reservoirs and device for establishing oscillatory axial movement of gas within the duct. Each reservoir contains an inlet and outlet, the inlet being adapted for feeding a mixture of carrier gas and the mixture of gases to be separated and the inlet for the other reservoir being adapted for feeding a carrier gas into the other reservoir. One of the outlets is adapted for the withdrawal from one of the reservoirs of a mixture of carrier gas and a mixture of gases of differing masses which is enriched in the heavier gas component and the other outlet is adapted for withdrawal from the other of the reservoirs of a mixture of a carrier gas and a mixture of gases to be separated being enriched in the lighter gas component.

Abstract: A device for the transport of large conduction heat flux between two locations of differing temperature includes a pair of fluid reservoirs for positioning at the respective locations connected by at least one duct, and preferably a plurality of ducts, having walls of a material which conducts heat. A heat transfer fluid, preferably a liquid, and preferably a liquid metal such as mercury, lithium or sodium, fills both reservoirs and the connecting ducts. An oscillatory axial movement or flow of working fluid is established within the ducts, with the extent of fluid movement being less than the duct length. Preferably the oscillatory movement is sinusoidal. Heat is transferred radially between the fluid and the duct walls and thence axially along the ducts. The rate of heat transfer is greatly enhanced by a physical mechanism which may be described as a high time-dependent radial temperature gradient produced by fluid oscillations.