Hydromagnetic flow between two porous disks rotating about non-coincident axes

• 来源期刊: 力学学报(英文版)
• 年，卷（期）: 2008,（5）
• 页码范围: 489-496
• 页数: 8页
• 语种: 英文
• DOI: 10.1007/s10409-008-0158-x

摘要

Hydromagnetic flow between two porous disks rotating with same angular velocity Ω about two non-coincident axes has been studied in the presence of a uniform transverse magnetic field. An exact solution of the govern-ing equations has been obtained in a closed form. It is found that the primary velocity f/Ωl increases and the secondary velocity g/Ωl decreases with increase in either Reynolds number Re or the Hartman number M. It is also found that the torque at the disk η=0 increases with increase in either M2 or K2. On the other hand there is no torque at the disk η=1 for large M2 and K2. The heat transfer characteristic has also been studied on taking viscous and Joule dissipation into account. It is seen that the temperature increases with increase in either M2 or K2. It is found that the rate of heat transfer at the disk η=0 increases with increase in either M or K. On the other hand the rate of heat transfer at the disk η=1 increases with increase in K but decreases with increase in M.