MOODYCHART: AN ACTIVEX COMPONENT TO CALCULATE FRICTIONAL FACTOR FOR FLUID FLOW IN PIPELINES

摘要

An ActiveX component, MoodyChart is written in Visual Basic 6.0 to calculate frictional factor for fluid flow in a pipeline using one of the three implicit and four explicit forms of Colebrook equation. The MoodyChart can be integrated in any computer language, which support object link embedding (OLE) in the windows environment. A function, FrictionalFactor (EqNo, Re, RelR), where EqNo, Re and RelR are equation number, Reynold number and relative roughness, respectively, is written in Visual Basic for Application (VBA) to use the MoodyChart in a workbook of MS-Excel. A comparative study among the calculated values of frictional factor indicates that the explicit equations of Serghide, and Zigrang and Sylvester provide reasonably consistent values of frictional factor for whole range of Re and RelR.