Chapter 4 Differential Relations For Viscous Flow 4.1 Preliminary Remarks Two ways in analyzing fluid motion (1) Seeking an estimate of gross effects over a finite region or control volume Integral (2)Seeking the point-by-point details of a flow pattern by analyzing an infinitesimal region of the flow Differential1 Chapter 4 Differential Relations For Viscous Flow 4.1 Preliminary Remarks * Two ways in analyzing fluid motion (1) Seeking an estimate of gross effects over a finite region or control volume. Integral (2) Seeking the point-by-point details of a flow pattern by analyzing an infinitesimal region of the flow. Differential