Slurry flow pressure drop

[MariusChE]

Hi there guys and girls

I want to lay my hands on a formula that calculates pipe flow pressure drop for slurries. I have done a search on thi site, did not find what I was looking for, searched the NET and so on.

I did find a Hungarian rersearcher's download document where he was trying to be so-o-o-o clever that I missed it. So, if there is anyone with some simple info that he/she would pass on...I promise I'll tell everyone you're a real genius.

Thanks

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[Sharik]

There is a neat spreadsheet program you can pick up at

http://www.chemputer.co.za.

The program is called Helix, Delta Q.

It has a special section for slurry flows.

 

[MariusChE]

Thanks Sharik

Do you happen to know anyone who has some first principle stuff for education purposes? I would like to get some fundamentals background.

Thanks
M

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[smckennz]

Hi Marius

slurry flow is a pig of a subject.
The theory goes on forever, and at the end you are strongly advised to do a test.
For starters, search "Durand slurry".
Durand has a good crack at the subject. Later researchers rubbish his results which tend to the conservative, but seldom do better.
Lazarus & Neilson did some good work, but I have been unable to find a web reference.
Wilson Addie Sellgren & Clift did some good work, but you will probably have to buy the book.
Hopefully these comments will bring you some useful results.
Be careful when viscosity becomes an issue.
Who was the Hungarian researcher?

Cheers

Steve

 

[MariusChE]

Thanks Steve

It was Jósef Faitili, U of Miskolch

Marius

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[bulkhandling]

The following information is good for relatively short pipelines (all plant pipes and field lines within a few miles).
1. determine minimum velocity. to reduce slurry wearing, the velocity should be as small as possible but big enough to keep particles floating. The Durand is a commonly used formula for most normal size pipes.
2. Slurry is a "pseudo" fluid. It is normallly assumed that Darcy or H&W formula can give an acceptable result providing a factor to be added due to particles dragging on the pipe wall which can cause extra friction (higher viscosity also contributes some more resistence). There is a curve for the factor but normally 15% can cover most cases if your calculation does not have to be accurate.
3. there are many publications to deal with the topic but A WARMAN booklet is a classic one.

For long distance slurry pipe, some research and lab test on the slurry will be required and more complicated theory will apply. Special engineering company should be contacted for that.

Hope a bit of help.

Bulk

 

[MariusChE]

Thanks
M

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