Physical and aerodynamic properties of date palm pollen grains


  • Mohamed M. IBRAHIM Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza
  • Mohamed GHONIMY
  • Eid ABD EL RAHMAN Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza



aerodynamic, date palm, pollen grain, properties, terminal velocity


The present study was designed to determine the effect of four moisture content levels (4, 5, 6, and 7 %) on the physical and aerodynamic properties of date palm pollen grain (DPP). The physical properties of DPP included pollen length (L), width (w), thickness (T), projected area (Ap), geometric mean diameter (dg), mass (m), sphericity (S), and bulk density (ρp). It was observed that the moisture content did not significantly influence the physical properties of the DPP. The aerodynamic properties of DPP included the terminal velocity (Vt), drag coefficient (Dc), drag force (Df), and Reynolds number (Re). The pollen Reynolds number (Re) is significant at different pollen grain moisture content, and regression models were developed in the form of polynomial and exponential relationships. Also, the 3rd order polynomial relationship was found between Re and Dc. The results showed that the average values of Vt, Dc, Df, and Re were about 0.6 m s-1, (0.38 to 0.45), 1.09E-11 N, and (0.29 to 0.42), respectively. The results of this study will be helpful in the performance of date palm pollination machines.

Author Biography

  • Mohamed GHONIMY

    Department of Plant Production and Protection, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah;
    Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza;


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13. 12. 2023



Original Scientific Article

How to Cite

IBRAHIM, M. M., GHONIMY, M., & ABD EL RAHMAN, E. (2023). Physical and aerodynamic properties of date palm pollen grains. Acta Agriculturae Slovenica, 119(4), 1–11.

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