Impact force distribution of granular material flowing from a hopper.

Date

4-2013

Degree

Bachelor of Science in Applied Physics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Balista, Junius Andre F.

Abstract

We study the spatial distribution of the force exerted by the impact of granular materials flowing from a hopper. Previous works on granular impact focused mainly on a single projectile, while studies on granular impact flowing from an orifice focused on flow rate. Studies on spatial distribution of force focused on static pile. The spatial profile of the time averaged force generated on impact by several grains that fell from a common origin, which is a funnel, was mapped using a piezoelectric sensor with a position distributed over a one dimensional range. The collection of a large number of data is made possible by interfacing the sensor array to an automated data logger. The force distribution, obtained from collated and normalized data from the sensors, exhibits a maximum value at the center which is the point nearest to the hopper. Similar to previous studies on granular impact, this work aims to understand the collisions of meteorites on Earth. However, this work specifically focused on situations when meteorites are disintegrated into smaller sizes in the atmosphere before impact.

Language

English

Location

UPLB Main Library Special Collections Section

Call Number

Thesis

Document Type

Thesis

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