Search Results - chang-jin+kim

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Micro-Trenches That Retain Trapped Gas Under High-Speed Water Flows (UCLA Case No. 2023-204)

Summary: UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a design of microstructured surfaces capable of retaining air pockets under water at flow speeds above 10 knots so that watercraft can travel with a reduced drag. Background: A major challenge limiting efficiency and speed of watercraft is the friction...

Published: 8/4/2023 | Inventor(s): Chang-Jin Kim, Ning Yu

Keywords(s): boats, Drag (Physics), drag reduction, fluid mechanics, friction reduction, fuel efficiency, hull, Hydrophobic, liquid-air interface, marine applications, maritime, microtrenches, navy, planing hull, Seawater, ships, Superhydrophobic, water sports, watercraft

Category(s): Mechanical, Materials

2016-303 A Low-Profile Flow Shear Sensing Unit

Summary UCLA researchers have developed an accurate low-profile shear sensing unit that is viable for both gas and liquid flows. Innovation UCLA researchers have developed a low-profile sensing unit that measures the shear stress of fluid flows in a direct manner. The unit suspends a plate with micro-flexures and reads its displacement with an optical...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Muchen Xu

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2011-040 Methods of Restoring and Maintaining Gas Film on Superhydrophobic Surface Underwater

SUMMARYUCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a method of maintaining and restoring a gas film on a superhydrophobic surface while underwater. BACKGROUNDA liquid interfaced directly with a solid creates frictional forces. For example, these frictional forces slow down a boat traveling through the water...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Choongyeop Lee

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Category(s): Chemical > Coatings, Adhesives & Inks

2010-247 Digital Microfluidic Platform for Radiochemistry

Summary UCLA researchers have created a novel, integrated microfluidic approach to radiochemical synthesis. Radiochemicals have been successfully synthesized on droplet-based microfluidic chips operated by electro-wetting-on-dielectric (EWOD) actuation. Background Radiochemicals have important uses in medicine, preclinical research, biology, biochemistry,...

Published: 7/19/2023 | Inventor(s): R. Michael Van Dam, Chang-Jin Kim, Gaurav Jitendra Shah, Supin Chen, Huijiang Ding

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Category(s): Chemical > Chemical Processing & Manufacturing

Liquid-Repellent Surfaces Made of Any Materials

UC Case No. 2014-186SUMMARY:UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a structured surface that can be made of any material (but demonstrated with glass) that repels all liquids (even fluorinated solvents) without using any repellant coating.BACKGROUND:Liquid-repellant surfaces have long been sough-after...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Tingyi Liu

Keywords(s): General Device Coatings

Category(s): Medical Devices > Coatings

2015-477 Method for Commercial Production of Super-Hydrophobic Materials

SUMMARYUCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a novel method for industrial production of super-hydrophobic material.BACKGROUNDHydrophobic materials are used in all aspects of daily life. For example surfaces of metal instruments, electrical instruments, cardboard packaging and clothing need to be water...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Muchen Xu

Keywords(s): General Device Coatings, Other Polymers

Category(s): Materials > Fabrication Technologies, Medical Devices > Coatings, Platforms > Drug Delivery > Other Polymers

2009-438 Localized Droplet Heating with Surface Electrodes in Microfluidic Chips

Localized Droplet Heating with Surface Electrodes in Microfluidic ChipsSUMMARYResearchers at UCLA have developed a low-cost, fully miniaturized lab-on-a-chip system that is capable of localized temperature control without the need to interface with macroscale tubes, thus taking full advantage of miniaturization via microfluidic protocols.BACKGROUNDMicrofluidics...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Wyatt Nelson

Keywords(s): Diagnostic Platform Technologies (E.G. Microfluidics), MEMS, Microfluidics And Mem's

Category(s): Life Science Research Tools > Microfluidics And Mems, Electrical > Mems, Platforms > Diagnostic Platform Technologies

2016-409 Fluid Manipulation by Electrodewetting

Summary: UCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a novel method that allows the manipulation of liquid droplets on a surface. Background: Electrode wetting on dielectric (EWOD) is a well-known effect that involves application of electric field to move or modify a fluid droplet. It is most commonly...

Published: 10/3/2023 | Inventor(s): Chang-Jin Kim, Jia Li

Keywords(s): Microfluidics And Mem's

Category(s): Life Science Research Tools > Microfluidics And Mems

2015-021 A Built-In Mechanism of Gas Maintenance in Microfeatures on a Submerged Surface

SUMMARYUCLA researchers in the Department of Mechanical and Aerospace Engineering have developed a novel superhydrophobic surface for drag reduction and anti-biofouling applications.BACKGROUNDSuperhydrophobic surfaces have unusual ability to repel water and may have utilities for applications including hydrodynamic drag reduction, de-icing, anti-corrosion,...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Muchen Xu

Keywords(s): Chemical Manufacturing & Industrial/Bulk Chemicals, General Device Coatings, Medical Devices and Materials

Category(s): Medical Devices, Medical Devices > Coatings, Chemical > Industrial & Bulk Chemicals

2010-309 Membraneless Fuel Cell with Self-Pumped Fuel and Oxidant

Membraneless Fuel Cell with Self-Pumped Fuel and OxidantSUMMARYResearchers at UCLA have developed a miniaturized membraneless fuel-cell system where the whole system can be reduced down to the millimeter scale without sacrificing output power.BACKGROUNDFuel cells are promising energy sources with higher theoretical energy densities than batteries. Despite...

Published: 7/19/2023 | Inventor(s): Chang-Jin Kim, Janet Hur, Desheng Meng

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Category(s): Chemical, Mechanical, Energy & Environment > Energy Storage, Electrical > Mems

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