Modeling of Physical and Compressive Test Properties of Tigernut Using Response Surface Approach

The Engineering data of tiger nut cultivated in Africa is high importance facilitating the design machineries for its effective and efficient cultivation, processing, handling, storage, postharvest activities general. This study aimed at determining modeling physical compressive test properties nuts as influenced by size, moisture level loading pattern. Applying Standard procedures a 3,4,3 response surface factorial design, Tiger were cleaned all foreign materials sorted into three different sizes 6mm, 9mm 12mm, conditioned four levels 7%, 10%, 13% 16% respectively. results shows that arithmetic mean diameter (AMD) ranged from 7-14.867 (mm), geometric (GMD) 6.982-14.853 sphericity (S) 0.931-1.011, area (SA) 153.216 -693.382 (mm2) aspect ratio (AR) 0.926-1.106. mass (M) 1000 201-1061 (g), volume (V) 25-96 (cm3), bulk density (BD) 0.634-0.979 (g/cm3), solid (SD) 0.712-0.989 (g/cm3) porosity (P) 11.08-21.45. angle repose (AOR) 20.58o-28.85o while coefficient friction (CF) on galvanized steel stainless-steel surfaces 0.222-0.352 0.201-0.02 It was observed that, increases, AMD, GMD, S, SA, AR, M, V, BD, SD CF increases respectively both P AOR decreases size increases. revealed maximum stress 0.26392-2.12026 (MPa), strain 1.20168-4.58292 (mm/mm). Energy 0.02298-0.50274 (J), load compression 27.5937-232.257 (N), extension 0.30271-4.01056 (mm). break 0.20376-1.75422 (MPa). 25.2221-200.257 (N). 1.39935-5.79384 0.24417-3.55188 energy 0.02113-0.33018 (J). yield 0.24918-2.37054 (MPa) 15.9373-210.693 ANOVA result reveals have significant effects measured except sphericity. Moisture level, pattern tested 95% confidence where no effect level. Empirical models developed properties. experimental generated this serves strong tools development such an oil milk extractor among others.