Differential and Integral Approach
Differential approach aims to calculate flow at every point in a
given flow field in the form
P(x,y,z,t). When we determine the
flow about an aerofoil using this approach we try to obtain the
needed properties like
Not every flow is as complicated as an aerofoil flow. In addition there is not necessary always to get a detailed information of the flow. One may establish a big control volume to encompass the region R and calculate the overall features like drag and lift by studying what happens at the boundary of the control volume, i.e., at the control surface.This procedure is called the Integral approach. Both these approaches are important to us. First we discuss the integral approach. When we are more familiar with the methods to analyse the flow we take up the differential approach. (c) Aerospace, Mechanical & Mechatronic Engg. 2005 University of Sydney |