Page 360 - Analysis and Design of Machine Elements
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338  Analysis and Design of Machine Elements























                       Figure 12.5 Viscosity-temperature curves for industrial mineral oils [5].

                       outlet section A B . Since the lubricant is assumed to be incompressible, the velocity
                                     1 1
                       distribution profiles must satisfy the condition that the volumetric flow rate through
                       inlet section A B equals that through outlet section A B . Combining the shear flow in
                                   2 2
                                                                    1 1
                       Figure 12.6a and pressure flow in Figure 12.6b, the resulting inlet velocity profile should
                       be concave and the outlet velocity profile convex, as shown in Figure 12.6c. Detailed
                       mathematical derivation can be found in Section 12.3.2. The external load is thus sup-
                       ported by fluid pressure generated by relative motion of surfaces.
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