## Search found 365 matches

Tue Oct 08, 2013 9:09 pm
Forum: Flow calculators and fluid flow problems
Topic: Elevated tank and piping calculation
Replies: 6
Views: 11252

### Re: Elevated tank and piping calculation

You can use calculator for change in elevation, but you have to enter that like pressure difference - like elevation difference of 10 m with water in pipe is pressure difference of 10 mWS. Flow regime is laminar or turbulent depending on the flow itself. You do not need to worry about it. Calculator...
Wed Oct 02, 2013 10:00 pm
Forum: Flow calculators and fluid flow problems
Topic: Sudden expansion in duct
Replies: 2
Views: 4012

### Re: Sudden expansion in duct

Here is what I have with pressure drop calculator just for sudden expansion: 1. volume flow rate (q): q : 0.75 m3/s 3. pipe length (L): L : 1 mm 4. pipe diameter (D): D : 120 mm 5. pipe roughness (kr): kr : 0.1 mm 6. density (ρ): ρ : 1.293 kg/m3 7. kinematic viscosity (ν): ν : 17.3 mm2/s 8. dynamic ...
Tue Sep 10, 2013 8:40 pm
Forum: Flow calculators and fluid flow problems
Topic: Natural Gas Pipework, pressure drop
Replies: 1
Views: 2808

### Re: Natural Gas Pipework, pressure drop

I am not sure that I understand you correctly. You have 100 m long gas pipe line 4" and 4" governor before the burner? The governor has 1.2 bar inlet pressure when burner is off? The governor lets 400 mbar with burner off? When burner starts, pressure goes down to 200 mbar after the governor and 700...
Tue Aug 06, 2013 10:23 pm
Forum: Flow calculators and fluid flow problems
Topic: effect of pump speed change at far end of pipe
Replies: 1
Views: 2005

### Re: effect of pump speed change at far end of pipe

You can't have two flow rates in one pipe with incompressible fluid like water, so with pump flow dropping from 50 to 40, pipe flow rate will change as well with speed of sound from point a to point b.
Sat Jun 15, 2013 9:39 pm
Forum: Flow calculators and fluid flow problems
Topic: Water Turbine Calculations
Replies: 3
Views: 8220

### Re: Water Turbine Calculations

Actual flow rate you can calculate based on the height difference and pipe diameter that you have. You can't tell at the start that you will have 100 l/s. That you can calculate. Here is report from calculation using pressure drop calculator: Pipe pressure drop calculator 1. volume flow rate (q): q ...
Thu Jun 13, 2013 9:03 pm
Forum: Flow calculators and fluid flow problems
Topic: air pressure drop calculation misleading
Replies: 1
Views: 2618

### Re: air pressure drop calculation misleading

Hi Adam, As you can see in calculator flow rate has symbol of - qn and it is for normal conditions (p=101325 Pa, T=0) so density is also at that condition. I can also add option to enter flow at p1 or p2 but I think it is not very convenient way for calculation - I think much more often you will not...
Mon May 20, 2013 1:29 pm
Forum: Flow calculators and fluid flow problems
Topic: Natural Gas Pipeline Commisioning Calculations Problem
Replies: 2
Views: 7162

### Re: Natural Gas Pipeline Commisioning Calculations Problem

For me it makes no sense also.
Where did you get purge rate of 0.00311 min/meter?
Mon May 20, 2013 1:15 pm
Forum: Flow calculators and fluid flow problems
Topic: Reynolds number calculator for Android phones
Replies: 1
Views: 2499

### Reynolds number calculator for Android phones

Reynolds number calculator is from now available for Android smart phones. Calculator is created on the basis of well established Reynolds number calculator for desktop users. It is designed for simple and quick calculation of Reynolds number based on known diameter, flow stream velocity (volume or ...
Fri Apr 19, 2013 7:42 am
Forum: Flow calculators and fluid flow problems
Topic: Depth of water in a 10 inch pipe
Replies: 1
Views: 2363

### Re: Depth of water in a 10 inch pipe

What is flow rate?
Is pipe filled with water or is it filled just for some level?
Fri Apr 19, 2013 7:34 am
Forum: Flow calculators and fluid flow problems
Topic: K Factor Calculator for fittings
Replies: 7
Views: 7187

### Re: K Factor Calculator for fittings

It depends on velocity that you use with K value. If you calculate minor loss as Dp = K rho * v^2 / 2 and use velocity on D1 than you should use K1, and for D2 - K2.