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Full-Text Articles in Mechanical Engineering
Leidenfrost Energy Barriers, James Peck, Anton Hassebrook, Craig Zuhlke, Troy P. Anderson, Dennis R. Alexander, George Gogos, Sidy Ndao
Leidenfrost Energy Barriers, James Peck, Anton Hassebrook, Craig Zuhlke, Troy P. Anderson, Dennis R. Alexander, George Gogos, Sidy Ndao
UCARE Research Products
In this work, an “Energy Barrier” was created to control the motion of Leidenfrost droplets. This barrier was created by functionalizing a portion of a mirror-polished stainless steel 304 surface with Femtosecond Laser Surface Processing (FLSP). FLSP results in superhydrophilic, hierarchical, micro- and nanostructures which are highly wetting and thus have an increased Leidenfrost temperature. Water droplets in the film boiling state were deposited, and propelled by gravity towards the Energy Barrier interface. Room temperature droplets were deposited over a range of surface temperatures beginning with the Leidenfrost temperature of mirror-polished stainless steel 304 and culminating at the Leidenfrost temperature …
Modeling Of Methane Tank Depressurization In Cold Weather, Brittney Bridger-Burton, Kevin D. Cole
Modeling Of Methane Tank Depressurization In Cold Weather, Brittney Bridger-Burton, Kevin D. Cole
UCARE Research Products
Non-metallic tanks are used in industry to store and transfer gasses such as methane. As the tanks are emptied, the properties of the gas change, causing heat transfer with the tank wall. When emptied while at low temperatures, liquid condensation can form and the tank lining can reach a critically low temperature, causing fracture to the tank wall. In this study, the emptying of methane in cold weather conditions from a non-metallic tank was modelled using Aspen Tech Software. A full tank of methane, at 250 bar and 288 K, was cooled to the following starting temperatures: 263, 253, 243, …