| Popis: |
Motility is a fundamental attribute of bacteria and is one of the common traits shown by it. Many bacteria swim freely in a fluid via rotation of flagella filament, while on the other hand many of them have developed a several varieties of cell motility mechanism without the aid of flagella. The later type of motility mechanism is adopted by rod-shaped bacteria known as gliding bacteria. These gliding bacteria can secrete an extracellular polymeric substance that allow them to move without flagella. This mysterious motility of gliding bacteria has been very attractive to many researchers in recent years and have been studied theoretically/experimentally and mathematically. In the current analysis, a mathematical fluid model (FENE-P) is used to explicate the motility of gliding bacteria on slippery, soft and rigid surfaces. For the mathematical description of the governing equations Cartesian coordinates are used. By utilizing the dimensionless variables, long wavelength and small Reynolds number approximation, the modeled partial differential equation are reduced into forth-order differential equation. The resultant highly non-linear ODEs for the large values of emerging parameters are numerically solved by Newton-Raphson technique. The study revel that the emerging parameters have major effects on gliding speed of the cell, flow rate of the slime and power consumed by the cell. The salient physical application of governing parameters is graphically underlined for soft and rigid surfaces. The outcomes are elaborated in detail further, it is renowned that the current analysis has many biomechanical applications such as it is relevant to marine anti-bacteria fouling and biofuel cell technologies. |
