Comparison of physical and hydrodynamic properties of two Iranian commercial pomegranates
Keywords:Keywords, pomegranate (Punica granatum L.), cv. Poost sefid, cv. Malas-Yazd, hydrodynamic properties
The aim of this study was to determine and compare several physical and hydrodynamic properties of two commercial pomegranate cultivars in Iran (Poost sefid and Malas-Yazd). Values of geometric diameter (74.61-82.45 mm), volume (176-503 mm3), true density (970.25-1,028.30 kg/m3) and packing coefficient (0.48-0.55) showed statistically significant difference at the 1% level. Besides, projected area and face surface area of cv. Poost sefid were 15 and 18 percent more than cv. Malas-Yazd, respectively (P<0.01). Terminal velocity, coming up time and drag force were 0.17 m/s, 3.42 s and 17 N for cv. Poost sefid and 0.18 m/s, 3.38 s and 1.94 N for cv. Malas-Yazd (P>0.05), respectively. Further, buoyancy force levels of cv. Poost sefid (3.25 N) and cv. Malas-Yazd (2.41 N) had statistically significant difference at the level 5%. The rupture force values of Iranian pomegranate varieties had significant differences at Y and Z-axes loading (P<0.05), while this factor was not significant at X-axes loading. The values of rupture energy for pomegranate varieties at all of the loading directions were also significant at 5% probability level. Determining these properties is of high importance in design and construction of conveying, sorting and processing machines and equipment for pomegranate cultivars.