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المؤلفMiraskari, Mohammad
المؤلفHemmati, Farzad
المؤلفJalali, Alireza
المؤلفAlqaradawi, M. Y.
المؤلفGadala, Mohamed S.
تاريخ الإتاحة2024-01-18T09:47:23Z
تاريخ النشر2016-11-09
اسم المنشورJournal of Tribology
المعرّفhttp://dx.doi.org/10.1115/1.4034244
الاقتباسMiraskari, M., Hemmati, F., Jalali, A., Alqaradawi, M. Y., & Gadala, M. S. (2017). A robust modification to the universal cavitation algorithm in journal bearings. Journal of Tribology, 139(3), 031703.
الرقم المعياري الدولي للكتاب0742-4787
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85030689387&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/50912
الملخصIn the current study, a modified fast converging, mass-conserving, and robust algorithm is proposed for calculation of the pressure distribution of a cavitated axially grooved journal bearing based on the finite volume discretization of the Adams/Elrod cavitation model. The solution of cavitation problem is shown to strongly depend on the specific values chosen for the lubricant bulk modulus. It is shown how the new proposed scheme is capable of handling the stiff discrete numerical system for any chosen value of the lubricant bulk modulus (β) and hence a significant improvement in the robustness is achieved compared to traditionally implemented schemes in the literature. Enhanced robustness is shown not to affect the accuracy of the obtained results, and the convergence speed is also shown to be considerably faster than the widely used techniques in the literature. Effects of bulk modulus, static load, and mesh size are studied on numerical stability of the system by means of eigenvalue analysis of the coefficient matrix of the discrete numerical system. It is shown that the impact of static load and mesh size is negligible on numerical stability compared to dominant significance of varying bulk modulus values. Common softening techniques of artificial bulk modulus reduction is found to be tolerable with maximum two order of magnitudes reduction of β to avoid large errors of more than 3-40% in calculated results.
راعي المشروعThe authors would like to thank Qatar National Research Fund (QNRF) for partially funding this project.
اللغةen
الناشرAmerican Society of Mechanical Engineers
الموضوعAdams/elrod model
Axially grooved journal bearings
Cavitation algorithm
Lubricant bulk modulus
Numerical stability
العنوانA Robust Modification to the Universal Cavitation Algorithm in Journal Bearings
النوعArticle
رقم العدد3
رقم المجلد139
ESSN1528-8897
dc.accessType Abstract Only


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