TY - JOUR KW - Journal bearings KW - Brinkman models; Dynamic coefficient; High permeability; Low permeability; Short bearing approximation; Stability analysis; Stability thresholds; Whirl frequency ratios KW - Linear stability analysis JF - Tribology - Materials, Surfaces and Interfaces N2 - The linear stability analysis of double porous and surface porous layer journal bearing based on long and short bearing approximations is presented. The Brinkman model is employed in the porous region and the infinite permeability porous layer is simulated as surface layer. The coefficients of load, threshold speed and critical whirl frequency ratio are computed for double porous and surface porous layer configurations. The coefficients obtained using long and short bearing approximations yield same results. Higher threshold speed is obtained for double layer configurations of (i) high permeability bearing adsorbent porous layer topped with low permeability porous layer, and (ii) surface porous layer lubricant film. © 2016 Taylor & Francis. Y1 - 2016/// UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959554306&doi=10.1080%2f17515831.2015.1123350&partnerID=40&md5=f2cffbfeac923edc2d608bf3b543caff AV - none VL - 10 TI - Stability analysis of double porous and surface porous layer journal bearing PB - Maney Publishing ID - scholars7963 SN - 17515831 N1 - cited By 15 SP - 19 A1 - Rao, T.V.V.L.N. A1 - Rani, A.M.A. A1 - Awang, M. A1 - Nagarajan, T. A1 - Hashim, F.M. IS - 1 EP - 25 ER -