Effect of polymer on flow in journal bearings

Berker, A. Nihat; Bouldin, M G; Kleis, Stanley J.; VanArsdale, William E.

doi:10.1016/0377-0257(94)01299-w

Cited by 42 publications

(11 citation statements)

References 15 publications

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“…For example, Berker et al [1] have indicated that the role of polymer additives in reducing journal bearing wear may be associated with some ''mitigating effects" of viscoelasticity on cavitation. Depolymerization is another field where cavitation bubbles play an important role [2].…”

Section: Introductionmentioning

confidence: 98%

Shock wave emission from laser-induced cavitation bubbles in polymer solutions

Brujan

2008

Ultrasonics

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Section: Introductionmentioning

confidence: 98%

Shock wave emission from laser-induced cavitation bubbles in polymer solutions

Brujan

2008

Ultrasonics

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“…Close agreement between the results may be observed. An example of consistent comparisons with data from Berker et al [10] is given in Figure 10 for the normalized velocity proÿles v Â (r 0 = 29:9 mm, r 1 = 30:3 mm, = 0:5, ! = 5:2 rad=s) at the azimuthal sections Â = 0 and .…”

Section: Numerical Procedures For Mixed Regime Ows With Local Transformentioning

confidence: 89%

“…The angle Â 1 corresponds to the limiting section between sub-domains 1 and 2 and is a priori unknown. Two reference kinematic functions --: present work; ♦: experimental data from Berker et al [10].…”

Section: Numerical Procedures For Mixed Regime Ows With Local Transformentioning

confidence: 99%

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Numerical study of flows of complex fluids between eccentric cylinders using transformation functions

Grecov¹,

Clermont

2002

Numerical Methods in Fluids

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SUMMARYIn this paper, we investigate uid ows between eccentric cylinders by means of two stream-tube analyses. The ÿrst method considers a one-to-one global transformation function that allows the physical domain to be transformed into a mapped domain, used as computational domain, that involves concentric streamlines. The second approach uses local transformations and domain decomposition techniques to deal with mixed ow regimes. Both formulations are particularly adapted for handling time-dependent constitutive equations, since particle-tracking problems are avoided. Mass conservation is veriÿed in both formulations and the relevant numerical procedure can be carried out using simple meshes built on the mapped streamlines. Fluids obeying anelastic and viscoelastic constitutive equations are considered in the calculations. The numerical results are consistent with those in the literature for the ow rates tested. Application of the method to the K-BKZ memory-integral constitutive equation highlights signiÿcant di erences between the model predictions and those provided by more simple rheological models.

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“…Besides the interest of considering such configuration as a benchmark problem [3], such flows are directly connected to journal bearing lubrication. The addition of polymers to Newtonian oils for industrial purposes has resulted in shear thinning and changes in elastic properties of the materials, thus leading to complex behaviour in such eccentric rotating geometries [4][5][6]. In the literature, numerous numerical studies have been devoted to problems occurring in journal bearings [7][8][9][10][11][12][13], with various methods for computing the flow characteristics.…”

Section: Introductionmentioning

confidence: 99%