What different between 'flow analysis using control volume method' and 'flow analysis using differential method'?

control volume

control volume is used to determine the flow characteristics of complex shape like turbine and compressors

differential approach

it is carried out by considering infintely small region for fluid analysis.

Explanation:

control volume:

control volume is used to determine the flow characteristics of complex shape like turbine and compressors it is used to determine the flow velocity within in the boundaries of control volume. it can also used for force analysis for flow. one main disadvantage of control volume is that it doesn't provide detail information about stress and pressure variation.

differential approach:

it is carried out by considering infintely small region for fluid analysis. solution of the fluid analysis is in the form of differential equation it provide detail information about the flow.