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19 results on '"Hossain, Muhammad Sajjad"'

6. Effects of Different Priming Treatments on The Germination and Growth of Okra (Abelmoschus esculentus L.)

Author

Alam, Md. Mahbub, Khan, Mujibur Rahman, Hossain, Muhammad Sajjad, Sultana, Mst. Sadia, Anjum, Md. Tanvir, Alam, Md. Mahbub, Khan, Mujibur Rahman, Hossain, Muhammad Sajjad, Sultana, Mst. Sadia, and Anjum, Md. Tanvir

Abstract

The study was designed to overcome the low germination of okra seed and to assess the effects of different seed priming treatments on okra (Abelmoschus esculentus) seedlings, which were encompassed nine treatments: control, hydro priming, SMP-sand metrix priming, H2SO4 - 40%, H2O2 - 2%, NaCl - 3%, KCl - 3%, CaCl2 - 3%, and KI - 1%. A randomized complete block design was used with three replications. Germination percentages, germination speed index (GSI), seedling vigor index (SVI), and relative growth rate (RGR) were measured. The highest germination percentage (89.77%) and GSI (9.6) were observed with (H2O2 - 2%). T3 (H2SO4 - 40%) exhibited the highest SVI (0.7), indicating robust seedling health. Additionally, H2O2 - 2%. demonstrated the longest root and shoot length (11.7 cm and 14.2 cm, respectively) and highest seedling fresh weight (0.87 g). Treatment with H2SO4 - 40% displayed the highest dry weight (0.18 g). Notably, H2O2 - 2% treatment significantly enhanced germination and growth compared to the control. These findings underscore the potential of seed priming, particularly H2O2 - 2%, in enhancing okra seedling growth and development, offering valuable implications for crop productivity and establishment.

Published
2024

8. Free convection at different locations of adiabatic elliptic blockage in a square enclosure.

Author

Billah, Sayeda Sadia, Hossain, Muhammad Sajjad, Fayz-Al-Asad, Md., Islam Mallik, Muhammad Saiful, Paul, Sreebash Chandra, Haque Munshi, Md. Jahirul, and Alam Sarker, Md. Manirul

Subjects
FREE convection, NUSSELT number, COMPUTER simulation, FLUID flow, HEAT transfer
Abstract

The numerical simulation of free convection flow within a square-shaped enclosure for various orientations of elliptic blockage (EB) is performed in the present study. The bottom wall of the cavity remains uniformly heated, where the left and right (side) walls as well as the boundary wall of the elliptic blockage are insulated and the top wall remains at a cool temperature. As Pr remains constant, the effects of different values of Ra have a great influence on overall fluid flow and temperature gradient for three different locations: bottom elliptic blockage (BEB), center elliptic blockage (CEB) and top elliptic blockage (TEB), as a mass flow circulation has been identified, and a state of equilibrium has been established within the fluid flow simulations along with the isotherm contours. The outcomes of the numerical analysis are presented with the streamlines, isotherms, and variations of the average Nusselt number. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Finite element simulation on MHD Free Convection in a Square Enclosure with Elliptical Shaped Obstacle.

Author

Hossain, Muhammad Sajjad, Sarder, C. K., Hoque, K. E., Bangalee, M. Z. I., Billah, M. M., and Uddin, M. Ashraf

Subjects
FINITE element method, MAGNETOHYDRODYNAMICS, RAYLEIGH number, CONVECTIVE flow, HEAT convection
Abstract

The study is focused on the magneto-hydrodynamic (MHD) free convection flow phenomenon with varied positions of elliptical obstacle in a square enclosure. Cavity's base wall is uniformly heated, and the enclosure has a cold top wall and insulated side walls. Three diverse positions of elliptical obstacle, such as, left-bottom elliptical obstacle (LBEO), right-bottom elliptical obstacle (RBEO) and right-top elliptical obstacle (RTEO) are deemed for the analysis inside the enclosure. Additionally, the elliptical barriers are evenly heated. The mathematical model was created using a few governing equations with boundary conditions, and the non-dimensional governing equations were then solved using a Galerkin finite element formulation. Various elliptical obstacles and the parametric research study for the wide range of Hartmann number (0=Ha=100), fixed Rayleigh number (Ra = 103) and Prandtl number (Pr = 0.7) have been used in this case. The results have been demonstrated for various positions of elliptical obstacle (LBEO, RBEO and RTEO) using the streamline phase, isotherms, and average Nusselt number in the cavity. The average Nusselt number was found to drop for the pattern of LBEO and RBEO when the Hartman number was raised, but increased for RTEO pattern. [ABSTRACT FROM AUTHOR]

Published
2023
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