Development of High-Porosity Porous Sintered Metal with Low Pressure Drop

Ultra Low Pressure-drop Helium-cooled Porous-tungsten Pfc

A new class of helium-cooled high heat-flux plasma facing heat exchanger (HX) concept is presented. These unique “Foam-In-Tube” HX concepts are composed of a thin tungsten shell integrally bonded to an open-cell tungsten foam core. High heat flux tests show maximum heat loads of 22.4 MW/m using 4 MPa helium at a flow rate of 27 g/s. Based on these impressive performance results, a unique and sc...

Pressure Drop in Microchannels Filled with Porous Media

The pressure drop in microchannels filled with porous media formed by square arrays of cylinders (micro-porous channels) is investigated. Combining the Brinkman equation and the existing models for permeability of regular arrays of cylinders, the pressure drop in the considered micro-porous channels is calculated theoretically. Soft lithography method is used to fabricate several Polydimethylsi...

Characterization of porosity of isostatically pressed and sintered nickel-base powdered metal.

Characterization of the pore structure of compacted and sintered parts made from a nickel-base powder was accomplished using the mercury porosimetry method. The theoretical density values for the sintered specimens varied from 56.3 to 96.7% which corresponds to a porosity of 43.7 to 3.3%. A maximum interconnecting median pore diameter of 21 mum resulted from a -80/+200 mesh powder compacted at ...

Photonic band-gap guidance in high-porosity luminescent porous silicon

Optimal Porosity Distribution for Minimized Ohmic Drop across a Porous Electrode

Optimal Porosity Distribution for Minimized Ohmic Drop across a Porous Electrode Venkatasailanathan Ramadesigan,* Ravi N. Methekar,* Folarin Latinwo, Richard D. Braatz, and Venkat R. Subramanian** Department of Energy, Environmental and Chemical Engineering, Washington University, St. Louis, Missouri 63130, USA Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, U...