Theses and Dissertations from UMD

Permanent URI for this communityhttp://hdl.handle.net/1903/2

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

Browse

Filters

20201

Settings

Author: search.filters.author.Arispe-Guzman, MarceloSubject: search.filters.subject.Vibrating powder bed

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Reduction of Mixture Property Variation Through Control on Initial Mixing Dynamics
    (2020) Arispe-Guzman, Marcelo; Bigio, David I.; Mechanical Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Blend homogenization of a liquid-solid mixtures is achieved through mixer agitation which disperses the liquids and breaks up the agglomerates. Creating energetic or pharmaceutical blends requires a very low degree of mixture variation in the final product. Initial solid-liquid feeding protocols into the mixer greatly affect the ability to achieve low variation at minimal energy input. Experiments in a vertically oscillating mixer using dyed silicon oil and glass beads examined the effect of feed protocols, while varying acceleration and the number of cycles. A Central Composite Design (CCD) DOE revealed that the percent homogeneity and coefficient of variation measures of mixing are linearly dependent on acceleration and number of cycles. Experimental observations lead us to redefine the model for breakup of wet agglomerates. This study offers a starting point to developing feed protocols to improve the efficiency of oscillating mixers, such as the resonant acoustic mixer (RAM), for liquid-solid mixing.