CFD Online Logo CFD Online URL
Home > Forums > General Forums > Main CFD Forum

Theory Question: Major and Minor Losses

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   January 31, 2016, 10:10
Default Theory Question: Major and Minor Losses
New Member
Daniel Shaw
Join Date: Nov 2015
Posts: 6
Rep Power: 9
shaw600 is on a distinguished road

I have a theory question that I hope you can help me with.

I'm going through the derivation of the major and minor system loss in natural ventilation and I have the major and minor losses in terms of the density:

However, when I look into these I find them in terms of gravitational acceleration:

How do you switch from one to the other?

The only way I have been able to find to do this is by using the specific weight:

But as this is not in the original equation, has it been assumed negligible as it is so small, therefore making: density = 1 / g

Here are links to the pages I used on EngineeringToolbox:
Natural Ventilation:
Minor Losses:
Specific Weight:

I hope you can help.
shaw600 is offline   Reply With Quote


losses, major, minor, pipe flow, theory

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 17:46.