Flow and heat over a rotating disk subject to a uniform horizontal magnetic field

TÜRKYILMAZOĞLU M.

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, cilt.77, ss.329-337, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 77
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1515/zna-2021-0350
  • Dergi Adı: ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, zbMATH
  • Sayfa Sayıları: ss.329-337
  • Anahtar Kelimeler: exponential solutions, heat transfer, horizontal magnetic field, rotating disk, similarity equations, wall shears, BOUNDARY-LAYER-FLOW, MHD FLUID-FLOW, MAGNETOHYDRODYNAMIC FLOW, ABSOLUTE INSTABILITY, NANOFLUID FLOW, DISTURBANCES
  • Hacettepe Üniversitesi Adresli: Evet

Özet

Magnetic field is often applied to stabilize the flow field in real life applications of fluid mechanics problems. In the present work, it is employed a horizontal uniform magnetic field to regularize the flow field triggered due to a rotating disk. The energy equation is also studied subjected to such a horizontal magnetic field. The applied horizontal magnetic field is different from the well-known applied external vertical magnetic field. It is shown that the horizontal magnetic field leads to a similarity system of equations with the help of the traditional von Karman similarity transformations. The effects of such a magnetic field on the development of velocity and temperature fields are then numerically investigated. The existence of exact series solutions in terms of decaying exponential functions is further discussed. The critical roles of horizontal magnetic field on the physical quantities involving the local wall shears, torque and the heat transfer rate are finally highlighted.