Viscoelastic lubrication with Phan-Thein-Tanner fluid (PTT)

Akyildiz F., Bellout H.

JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME, cilt.126, sa.2, ss.288-291, 2004 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 126 Sayı: 2
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1115/1.1651536
  • Dergi Adı: JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.288-291
  • Anahtar Kelimeler: lubrication flow, Phan-Thein-Tanner model(PTT), thin film, finite difference, NON-NEWTONIAN LUBRICATION, NUMERICAL-SIMULATION, PLANAR CONTRACTION, 2ND-ORDER FLUID, MODEL, FLOWS
  • Ondokuz Mayıs Üniversitesi Adresli: Hayır

Özet

We analyze the lubrication flow of a viscoelastic fluid to account for the time dependent nature of the lubricant. The material obeys the constitutive equation for Phan-Thein-Tanner fluid (PTT). An explicit expression of the velocity field is obtained. This expression shows the effect of the Deborah number (De =lambda U/L, lambda is the relaxation time). Using this velocity field, we derive the generalized Reynolds equation for PTT fluids. This equation reduces to the Newtonian case as De --> 0. Finally, the effect of the Deborah number on the pressure field is explored numerically in detail and the results are documented graphically.