Effect of particle size and compressibility on the flowability of wheat, cornstarch, tapioca and atta flours

Mohd Taufek, Fatin Najibah (2019) Effect of particle size and compressibility on the flowability of wheat, cornstarch, tapioca and atta flours. [Project Paper] (Submitted)

Text lp FK 2019 16.pdf Download (38MB)

Abstract

Four types of commercial flour were used in this project which are wheat flour, cornstarch flour, tapioca flour and atta flour. This research is conducted to investigate the flow and the effect of physical properties of flours and their relationship to design the outlet diameter of hopper flow. The flowability and the cohesiveness of the powders are determined using Carr index and Hausner Ratio. The Flow properties were measured using shear cell technique, and the physical properties measure were particlesize, moisture and densities (bulk, tapped and true). The compressibility is done by direct compression using uniaxial die compaction. A shear cell test give result flow factor indec, varied from easy flow the very cohesive. It was found that the atta and wheat flours were very cohesive powder with highest particle size (173.96 ± 2.12 µm) and (140.93 ± 4.63 µm) respectively whereas cornstarch and tapioca cohesive powder with lowest particle size (22.05 ± 0.08 µm) and (21.88 ± 0.05 µm)respectively. The shear cell test also can give result to calculate the outlet diameter of hopper flow. The mos cohesive powder was found in atta flour with Carr index (42.68%) due to its high content fat that reduced the flowability. As for hopper flow design the diameter of each powder was determind. The largest outlet diameter of hopper flow was atta flour (0.24 m). This study show that fat content was the major influence of flowability instead of particle size and compressibility. Thus, atta flour was the most cohesive powder between wheat, cornstarch and tapioca flour. Atta flour had the highest value of carr index, hausner ratio and lowest flow factor index that indicated its flowability was the poorest. Thus, this study is very helpful in understanding of flowability of powders and can be applied in industry application.

Item Type:	Project Paper
Faculty:	Faculty of Engineering
Depositing User:	Ms. AZLINA ZAINAL ABIDIN
Date Deposited:	19 Nov 2024 08:54
Last Modified:	19 Nov 2024 08:54
URI:	http://psaspb.upm.edu.my/id/eprint/2214

Actions (login required)

View Item