School of Engineering


Showing 81-89 of 89 Results

  • Oliver Fringer

    Oliver Fringer

    Associate Professor of Civil and Environmental Engineering

    BioFringer's research focuses on the development and application of numerical models and high-performance computational techniques to the study of fundamental processes that influence the dynamics of the coastal ocean, rivers, lakes, and estuaries.

  • Martin Frost

    Martin Frost

    Systems Manager, Computer Science

    Current Role at StanfordManage computer systems and backups for Computer Facilities in the computer science department.

  • Lin Fu

    Lin Fu

    Postdoctoral Research Fellow, Mechanical Engineering

    Current Research and Scholarly InterestsHigh-order numerical scheme for conservation laws, Interface tracking method for multi-phase flow, Smoothed-particle hydrodynamics (SPH) method, Partitioning and domain decomposition methods, Unstructured mesh generation.

  • Gerald Fuller

    Gerald Fuller

    Fletcher Jones II Professor in the School of Engineering

    BioThe processing of complex liquids (polymers, suspensions, emulsions, biological fluids) alters their microstructure through orientation and deformation of their constitutive elements. In the case of polymeric liquids, it is of interest to obtain in situ measurements of segmental orientation and optical methods have proven to be an excellent means of acquiring this information. Research in our laboratory has resulted in a number of techniques in optical rheometry such as high-speed polarimetry (birefringence and dichroism) and various microscopy methods (fluorescence, phase contrast, and atomic force microscopy).

    Another application of orientation dynamics is in the development of solar cells. The efficiency of second-generation solar cells fabricated with conjugated polymers is limited by photoelectron transport within the polymer film. Inspired by electrorheological fluids, an external electric field is applied to the film to induce anisotropy in polymer crystallites, which is expected to enhance electron mobility.

    The microstructure of polymeric and other complex materials also cause them to have interesting physical properties and respond to different flow conditions in unusual manners. In our laboratory, we are equipped with instruments that are able to characterize these materials such as shear rheometer, capillary break up extensional rheometer, and 2D extensional rheometer. Then, the response of these materials to different flow conditions can be visualized and analyzed in detail using high speed imaging devices at up to 2,000 frames per second.

    There are numerous processes encountered in nature and industry where the deformation of fluid-fluid interfaces is of central importance. Examples from nature include deformation of the red blood cell in small capillaries, cell division and structure and composition of the tear film. Industrial applications include the processing of emulsions and foams, and the atomization of droplets in ink-jet printing. In our laboratory, fundamental research is in progress to understand the orientation and deformation of monolayers at the molecular level. These experiments employ state of the art optical methods such as polarization modulated dichroism, fluorescence microscopy, and Brewster angle microscopy to obtain in situ measurements of polymer films and small molecule amphiphile monolayers subject to flow. Langmuir troughs are used as the experimental platform so that the thermodynamic state of the monolayers can be systematically controlled. For the first time, well characterized, homogeneous surface flows have been developed, and real time measurements of molecular and microdomain orientation have been obtained. These microstructural experiments are complemented by measurements of the macroscopic, mechanical properties of the films.