The discussion centers on the determination of head loss (Δhloss) in fluid flow, specifically comparing laminar flow (Re < 2000) and turbulent flow (Re > 10000). Participants explore whether the formula for Δhloss remains the same in both cases and how the friction factor (f) varies with flow type and roughness.
Participants generally agree that the formula for Δhloss is structurally the same for both laminar and turbulent flow, with the friction factor being the primary variable that changes. However, the complexity of the friction factor in turbulent flow introduces some uncertainty regarding its application.
The discussion does not resolve the specific implications of using the Moody chart for turbulent flow or the exact conditions under which the formulas apply, leaving some assumptions and dependencies unaddressed.
Chestermiller said:For laminar flow, f = 16/Re. For turbulent flow, the dependence on Re is more complicated than this and the friction factor also depends on the roughness. This is all captured in the Moody chart, for both laminar and turbulent flow.
Yes.williamcarter said:Thank you for your quick reply.
I understood this, but basically the formula for Δhloss will be the same , in both cases?Also for K formula would be the same in both cases?
Just f changes depending on flow type and roughness right?
I mean f for Laminar is 16/Re and f for Turbulent is intersection between Re and ξ on Moody chart