May 2009

Piping/Fluid Flow

New explicit friction factor equation for turbulent flow in rough pipes

It is more reliable and accurate than existing equations

Sasan-Amiri, A., Bouali Sina Petrochemical Company

Darcy-Weischbach introduced the basic equation (Eq. 1) to determine key parameters of a piping system design like pipe diameter, pressure drop and volumetric flowrate. In addition to fluid density and velocity and pipe length, friction factor, ƒ, estimation under laminar or turbulent flow in smooth or rough pipes is an important step to calculate the mentioned items accurately. Fig. 1 shows the Moody diagram that is used for ƒ graphical estimation both under laminar and turbulent flows for smooth and rough pipes. For laminar flow, ƒ values are easily determined from Fig. 1 or by Eq. 2 but, for turbulent flow, graphical estimation of ƒ values are highly dependent on the

Log in to view this article.

Not Yet A Subscriber? Here are Your Options.

1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.

2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain ACCESS to the current issue as well as to 3 articles from the HP archives per month. $409 for an annual subscription*.

3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,995 for an annual subscription.  For information about group rates or multi-year terms, contact email Peter Ramsay or call +44 20 3409 2240*.

*Access will be granted the next business day.

Related Articles

From the Archive



{{ error }}
{{ comment.comment.Name }} • {{ comment.timeAgo }}
{{ comment.comment.Text }}