Figure 21 Flow in a pipeline

and the volumetric flow rate (Q) are related by the definition Q = nD2V/4. Thus these three variables are not independent, since any one of them can be derived from the other two by this definition, it would therefore be necessary to include only two of the three.

Step 2: List all the problem variables and parameters, along with their dimensions. The procedure is simplest if the most fundamental dimensions in a scientific system (i.e., M, L, t) are used (e.g., energy should be converted to FL = ML2/t2, etc.):



0 0

Post a comment