The present study aims to probe the role of an influential factor heretofore scarcely considered in earlier studies field thermovibrational convection, that is, specific time-varying shape forcing used produce fluid motion under effect imposed temperature gradient. Towards this end, two different temporal profiles acceleration are considered: a classical (sinusoidal) and pulse (square) wave. Th...

A high molecular polymer solution with viscoelasticity has the effect of reducing frictional drag, which is quite practical for energy saving. Effective simulations viscoelastic flows in a pipeline Reynolds number realized by incorporating constitutive equation into k−ε−v′2¯−f turbulence model. The Finitely Extensive Nonlinear Elastic Peterlin (FENE-P) model employed characterizing viscoelastic...

The theory for the non-isothermal rheology of polymer fluids proposed in Curtiss and Bird (Adv Polym Sci 125:1–101, 1996) used several approximations including so-called linear gradient temperature field Brownian forces. While it had significant advantage dealing with equations, involved may have led to non-physical predictions. This work is a continuation (1996) that obtains corresponding non-...

BACKGROUND Initial investigations demonstrated a deficiency of glutathione (GSH) in the epithelial lining fluid (ELF) of HIV-seropositive patients. In a recent study, our laboratory was unable to document such a deficiency. The current study was performed in an attempt to reconcile those disparate findings. STUDY OBJECTIVES To determine if ELF GSH decreases over time in asymptomatic HIV-serop...