the effect of the particle size distribution on non-newtonian turbulent ...
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the effect of the particle size distribution on non-newtonian turbulent ...

the effect of the particle size distribution on non-newtonian turbulent ... the effect of the particle size distribution on non-newtonian turbulent ...

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Chapter 3 Experimental Work Figure 3.8: Pressure tapping and solids collecting pod Page 3.8 Pressure measurement points are located at 45° to ong>theong> horizontal to ensure that ong>theong> ingestion ong>ofong> solid ong>particleong>s or air bubbles into ong>theong> solids trap (see Figure 3.9) is kept to a minimum. There is, however, a valve located on each solids trap for flushing away any unwanted solids which may accumulate. The manometer and differential pressure transducer (DPT) are connected by clear water lines to ong>theong> solids trap. The test sections which are 2,995m in length are preceded by unobstructed straight pipe ong>ofong> at least 50 pipe diameters (Govier & Aziz, 1972 and Hanks 1981). The only

Chapter 3 Experimental Work Page 3.9 exception is ong>theong> 200mm nominal bore pipe which has a straight entry length ong>ofong> 35 pipe diameters. (b) Manometer Board The manometer board serves as a centralised point for measuring pressure and flow. There are six differential water manometers and ong>theong> layout is shown in Figure 3.9 and Figure 3.10. Electrical signals from ong>theong> DPT and flow meters are output from ong>theong> board to ong>theong> data logging system (Figure 3.11). Head loss measurements can be measured with manometer menisci visible or masked, although ong>theong> air over water manometer head (ie. visible) is usually maintained during a test run to provide confirmation ong>ofong> head loss measurements. Flushing water is supplied from ong>theong> water main (400 kPa) and air pressure is supplied at 800 kPa by a compressor. Figure 3.9: Manometer Board

Chapter 3 Experimental Work<br />

Figure 3.8: Pressure tapping and solids collecting pod<br />

Page 3.8<br />

Pressure measurement points are located at 45° to <str<strong>on</strong>g>the</str<strong>on</strong>g> horiz<strong>on</strong>tal to ensure that <str<strong>on</strong>g>the</str<strong>on</strong>g><br />

ingesti<strong>on</strong> <str<strong>on</strong>g>of</str<strong>on</strong>g> solid <str<strong>on</strong>g>particle</str<strong>on</strong>g>s or air bubbles into <str<strong>on</strong>g>the</str<strong>on</strong>g> solids trap (see Figure 3.9) is kept<br />

to a minimum. There is, however, a valve located <strong>on</strong> each solids trap for flushing<br />

away any unwanted solids which may accumulate.<br />

The manometer and differential pressure transducer (DPT) are c<strong>on</strong>nected by clear<br />

water lines to <str<strong>on</strong>g>the</str<strong>on</strong>g> solids trap.<br />

The test secti<strong>on</strong>s which are 2,995m in length are preceded by unobstructed straight<br />

pipe <str<strong>on</strong>g>of</str<strong>on</strong>g> at least 50 pipe diameters (Govier & Aziz, 1972 and Hanks 1981). The <strong>on</strong>ly

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