With characteristic time constants for polymer dynamics, namely τs (the segment fluctuation time), τe (the entanglement time), and τR (the longest Rouse relaxation time), the time scales of particular interest (i) τ < τss (ii) τS < t < τe, and (iii) τe < t < τR will be discussed and compared with experimental data. These ranges correspond to the chain-mode length scales (i) ℓ < b, (ii) b < ℓ < d2 /b, and (iii) d2/b < ℓ < L, where b is the statistical segment length, d is the dimension of constraints by entanglements and/or confinement, and L is the chain contour length. Based on Langevin-type equations-of-motion coarse-grained predictions for the mean-squared segment displacement and the spin-lattice relaxation dispersion will be outlined for the scenarios "freely-draining", "entangled", and "confined". In the discussion we will juxtapose "local" versus "global" dynamics on the one hand, and "bulk" versus "confined" systems on the other. © 2010 Materials Research Society

Kimmich R.

Fatkullin N.

Herbich, John B

Lehigh University: Lehigh Preserve

Lehigh University
Lehigh Preserve
Fritz Laboratory Reports Civil and Environmental Engineering
1960
Status report on research project on improving
design of a hopper dredge pump, November 1960
John B. Herbich
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Recommended Citation
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Laboratory Reports. Paper 1775.
http://preserve.lehigh.edu/engr-civil-environmental-fritz-lab-reports/1775
..
FRITZ ENGINEERING LABORATORY
HYDRAULICS DIVISION
Memorandum No. M-19
F.L. Report No. 277-M-19
STATUS REPORT ON RESEARCH PROJEQT
ON
IMPROVING DESIGN OF A HOPPER DREDGE PUMP
Prepared by
John B. Herb ich
Prepared for
U.S. ARMY ENGINEER DISTRICT, PHIIADELPHIA
Corps of Engineers
Philadelphia 29, Pennsylvania
Contract No. DA-36-l09-CIVENG-59-ll2
November 1960
Bethlehem, Pennsylvania
CON TEN T S
Page
1. Introduction 1
2. Experimental Studies 1
3. Additional Studies 2
4. References
5. Appendix
STATUS REPORT ON RESEARCH PROJECT
ON
IMPROVING DESIGN OF A HOPPER DREDGE PUMP
I.. INTRODUCTION
The following report summarizes the studies
performed during the month of October 1960, at the
Hydraulics Division of Fritz Engineering Laboratory,
under terms of Contract No. DA-36-109-CIVENG-59-112,
. .
Earlier work was described in status reports dated:
December 1958( l){F, February 1959(2), April 1959( 3),
June 1959(4), December 1959(6), March 1960(9),
April1960(10), May 1960(11), June 1960(12), July
1960(13),. August 1960(15), September 1960(16), and
a project report dated September 1959( 5).
II. EXPER IMENTAL STUDIES
A. General Comments
No experimental tests were carried out during
this period a~ the volute casing is b~ing repaired.
The latest word from the manufacturer is -that the
shipment will be made about December 16, 1960.
{~ Numbers in parentheses indicate REFERENCES
B. Characteristic Curves
Additional characteristic curves for the pump
with impellers No. TD-S and TD-6 have been prepared
and are presented in the Appendix.
Figures A-I to A-6 present the characteris-
tic curves forsilt-clay-water mixture concentration
of 1240 ,grams per liter. The curves were plotted for
two impellers, TD-5 and TD-6, on the same graphs for
comparison reasons. The following pump speeds are
presented:
2
Figure
A-I
A-2
A-3
A-4
A-S
A-6
Speed (rpm)
11SO
1300
1440
lSSO
16S0
17S0
Additional characteristic curves are being prepared
for two silt-clay-water mixture concentrations:
1170 and 1320 grams per liter.
III. ADDITIONAL STUDIES
It was indicated in Memorandum No. M-15(16)
that it would be valuable to test additional impell-
ers to isolate effects of vane shape and vane exit
angle on pump characteristics.
Cost estimates for extending the phases B
and C of the present study have been prepared and
submitted to the sponsor separately.
..... , : ,.... '
REF E RE N C E S
.. ' "ii,:',: ':H~~brch., .T~B·~" i •• STATUS'RJ~PORT'OF RESEARCH PROJECT ON ,
IJ.iPROVING DESIGN OF A HOPPER DREiDCJE
PUMP. Fritz Engipeer;1ng Laboratory
Memorandum No. M-l
Lehigh University, December 1958
(2) Herbich, J. B.
(,3) H~rpich" J. B.
(4) Herbich, J. B.
(S) Herbich, J. B.
. (6) Herbich, J. B.
(7) ~rbi~h, J. B.
Weiss, W. L.
Waddington, w.
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING D~IGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M~2
Lehigh University, February 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. FritzEl1gineeringL~boratory
Memora~dum No. M-3
Lehigh University, April 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engipeering Laboratory
M~mora~dum No. M-4
Lehigh Vniversity, June 1959 .
CHARACTERISTICS OF A MODEL DREDGE PUMP.
Fri tz' Engineering Laboratory
Project Report No. 31 .
Lehigh University, September 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz EngineeJ:"ing Labora.tory
Memora~dum No. M-5 . .
Lehigh University, December 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OFA HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-6
Lehigh University, February 1960
Referenoes ; ..
(8) Weiss,W Q Lo
(9) .Herbloh" Jo' B~ .,
(10) Herbioh, J~ Bo
(11) Herbioh, Jo Bo
(12) Herbioh; J. Bo
Waddihston~:.W·oMo .
(13) H~rbioh, J. Bo
, ~ong;, J" ..Lo
(14) Iversen, Ho Wo
·Ro11ing, R~ Eo
Carlson, J. J".'
.,
{
SUGGESTED DESIGN CHANGES FOR A
.CENTRIFUGAL' PUMP' IMPELLER
HANDLING DREDGED MUD
, Fritz Engineering Laboratory
Speoia1 Report
Lehigh Un.iversity, November. 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-8
Lehigh UniversitY,Maroh 1960
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-9
Lehigh University, April 1960
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING:lJE3IGN OF A HOPPER DREDGE
,PUMP. FritzEngineering Laboratory
Memorandum No. M-12
Lehigh University, May 1960
ANALYSIS OF HIGH-SPEED MOVIES OF A
MODEL' puMP~'
Fritz Engineering Laboratory
Memorandum No. M-l1
Lehigh Univdrsity, June 1960
STATUS REPORT OF RESEARCH PROJECT, ON
IMPROYING DESIGN OF A HOPPER DREDGE
: PUMPo Fritz Engineering Laboratory
Memorandum No. M-13
Lehigh University, July 1960
VOLUTE PRESSURE DISTRIBUTION, RADIAL
FORCE ON THE IMPELLER, and VOLUTE MIX-
·ING LOSSES OF A RADIAL FLOW CENTRI-
FUGAL PUMP 0
ASME Paper No. 59-Hyd-10,
Journal of Basic Engineering, 1959
f·
References
(15) Herb ich, J.B.
(16) Herbich, J.B.
( 17) Herb ich, J.B.·
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-14
Lehigh University, August 1960
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-15
Lehigh University, September 1960
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering L~boratory
Memorandum No. M-17
Lehigh University, October 1960
I
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Concentration: 1240 grams/liter
Speed ~ 1150 rpm
200 00 600 00
FJ..ow~
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Fig. A-2 - MODEL DREDGE p~ CHARACTERISTICS
Concentration~ 1240 grams/liter
Speed~ 1300 rpm
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o 200 400600 tOO nO' :L 0
Flow GPM
Fig. A-3 - MODEL DREDGE PUMP CHARACTERISTICS
Concentration: 1240 g~ams/1iter
Speed: 1440 rpm
· I
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Fig. A-4 - MODEL DREDGE PUM~ CHARACTERISTICS
Concentration: 1240 grams/liter
Speed: 1550 rpm
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Fig o A-5 ~ MODEL DREDGE PUMP CHARACTERISTICS
Concentration~ 1240 grams/liter
Speed~ 1650 rpm
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I!I'!~ ','IIII!!1 'II Ii liililltf!: ',I) I',:i ::;i H iii'"~ il: lil l, 11:1 :i;i ;11 1,'II! 11',1 1I'ill i!III!, 11,11 liii :i,,: ::ii ,!I i: ;~:: ~z;., :1,;<t3~ I liil 11"l",~.r:i I~:", ,I" J;.r; "T ", ••. , '" '" j,;f '! ' ,I ,II. t 'I" ;" 1.,1 'I' ...-,.JI~, .,=,~
I' , "I" ' I Ii I':,: I"' ;ii!I!:~' :I';! I,ll !:: ~':I 1:'1' iM'" '.. , I';,' ii· 'I:: j';; I::j :1111 1," ;11 i: l; Itt.Jt¥.+H1+H1+H1+H+H"+H+t+!rr':1 II ,111: III!I: 'II ';~ ::: ::. :~l ,:: II:: :Ij :1; II;: ,:;1 :;. ::1. l!l l', .nt rU.
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II, I
1000
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00
II II
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I I
tl ,Ii: ,:1
00
Flow
o
Fig. A-6 - MODEL DREDGE PUMP CHARACTERISTICS
Concentration: 1240 grams/liter
Speed: 1750 rpm


English

Status report on research project on improving design of a hopper dredge pump, November 1960

Lehigh University
Lehigh Preserve
Fritz Laboratory Reports Civil and Environmental Engineering
1960
Status report on research project on improving
design of a hopper dredge pump, September 1960
John B. Herbich
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Recommended Citation
Herbich, John B., "Status report on research project on improving design of a hopper dredge pump, September 1960" (1960). Fritz
Laboratory Reports. Paper 1773.
http://preserve.lehigh.edu/engr-civil-environmental-fritz-lab-reports/1773
FRITZ ENGINE~~ING LABORATORY
HYDRAULICS DIVISION
Memorandum Noo M~lS
FoL. Report No. 277-M-lS
STA'I'US REPORT ON h.2SEARCH PROJECT
ON
INPROVING DESIGN OF A HOPPER DREDGE PUMP
Prepared by
John B 0 Herb ich
Prepared for
U.S. AR.1\fY ENGINEER DISTRICT~ PHILADELPHIA
Corps of Engineers
Phi.lade Iphia 29 g Pennsylvania
Contract No. DA-36-l09~CIVENG-S9~112
September 1960
Bethlehem, Pennsylvania

STATqS REPORT OF RESEARCH PROJECT
ON
lMPROVING DESIGN OF A HOPPER DREDGE PUMP
. . , I .
I. INTRODUCTION
The following repol1t summar izes the studies per-
forme~ during the month. of A~gust 1960, at the Hydraulics
D~vi~1on of Fr~tz ~ng~neeril1g Laboratory, under terms of
Contraqt lJo •.DA"'36-109-CIV~NG-59~112. Earlier work was
de~cn1b~d 1n status reports dated~ December 1958( l)it-,
F~br~ary 1959(2), April 1959(3), June 1959(4), Decem-
ber 1959(6), March 1960(9), April 1960(10), May 1960
(11), June 1960( 12), JUly 1960( 13), August 1960( 15),
and a prpject report dated September 1959(5).
\
II. EXPERIMENTAL STUDIES
. A~ Gene"ral Comments
. t t'r I
Th~ exp~rimental tests were performed with two new
1mp~11~rs: (a) ';i;mp~ller of Trial Design No.5, and (b)im-
I
p~flerof Trial ~esign No.6. It will be recalled that
both !mp~ller~ were designed with 45 degrees entrance angle
apd w1tp 28-3/4 degre~s exit angle; however, the shape of
van~ ~n the impel~er Np. 5 was logarithmic, while the vane
shape 1n tq~ ~mpeller No.6 was involute. Sketches of im-
p~er~ ~o. 5 and No. 6 were presented in Memorandum N9.
f1'1'1~(13).
.~. ~ ~
*Numqe~~ in par~nthesis refer to References.
2The data were obtained for the following concentra~
tion of silt-clay-water mixtures.
1170 grams/liter
1240 gl>arns/l1ter
1320 grams/liter
1380 gl~ams/liter
B. Characteristic Curves
-----",-.---' -g~........,--
The characteristic cur'ves for the pump with impell-
ers No. 5 and 6 are being prepared, and will be submitted
in the next Memorandum.
C. Charact~ristic Curves for Impeller No.1
i,
The ctlaracterist;,ic curves for the pump equipped with
impeller No. 1. when handling the 1382 grams/liter concentra-
tio~, w~re pr.esented in Memorandum No. M-14(15). It appears
ee~tain that the maximum efficiency attained in that test
series is too high, and the incI'ea.sed clearance between the
impe ller and the volute cas ing is respons ib Ie for the high
efficiency. It would be of value to rebuild the impeller
~o. 1 and run a check test on it.
D~ Efficie!lcy
Th~ effici~ncy comparisons for three impellers are
~resented in Tables I - IV for various concentrations. It
appe~~s that the efficiency is considerably higher for imrc
pellers No. 5 and 6 as compared with the impeller No.1.
372 t-'---:...----+--...::~__1I___---+_---_+_---_1
..
,
1400l2PO 1 130.0'Cono~ntrat1on i7+
\i .", "
, I
,ls' seen in the sketoh above, the impeller NOd .'$ 1s. 1lI1~ghtly
~!71orr' effioient at oonoentrations of about 1240 grams/liter
and 1320 grams/liter, while the impeller Bo. 6 is mor~ et-
fioierit'Q at oonoentrations of 1,170 gxos'iiiS/liter mnci 1380
; :~
'The oonsiderable improvement of'p~mp effioienoy is .
/.
''-,';vsft,'t gratifying. Howe'ver, there lfe1"~ t~() ohangss made be-
~;, ., fo
>l. • ; i:
''U1WEI,ejj.;<impeller No.1 and $ithe~ im.pe·ller>1)J,o. 5 or 6 p viz!
·'.the~ ~nged.n exit angle and t1)e 'change ~ vane shape." It
!~.is. ,not' If.hown whioh ohange contr1b~'te~ m~~.~' to, t~e' .16iprove-
:'~":meJ;lt: il1!~'e'tt.icienc,.. It -e-ill ,be of geQt'i~alue.t·o tesit an-
. t::'-. '. ··.'..... t:~.;~ ;' . >:. • :
'other impeller With" onl~: o~e change, either ip':"ane shape
.., .
or exit angleto..determ.ine this.
.....
.....~.
. ....
i
(2) HeI'b~ch, J. B.
(3) ijerbich.,;r~ B.
(4) H~I'bl0h, J. B,
REF E RE N C E S
STATUS REPORT OF RESEARCH PRQJECT ON
IMPROV:I;NG DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-l
Lehigh University, Decembe~ 1958
STATUS REPORT OF RESEARCH PROJECT ON
I.MPROVING DESIGN OF A HOPPER DREDGE
.,' ,
FqMP. Fritz Engineering ~aboratory
Memorandum No. M-2
Lehigh Univer~ity, February 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPP:J5RDREDGE
PUMP. Fritz~gineeringLaboratory
Memorandum No.M~3
Lehigh University, April 1959
STATUS R~PORT OF ~ESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Ffitz~glneering Laboratory
Memorandum No. M-4
Lehi~ University, June 1959
(5)
(6)
(7)
Hel'blch, J~ B.
~e~bich~ J. B.
HerQich, J. B.
Weiss, w. ~.
Waddingtpn, w~
CHARACTERISTICS OFA'MODEL DREDGE PUMP
Fritz Engineering Laboratory
Project Report No. 31
Lehigh Upiversity, September 1959
ST4TUS ~EPORT OF REsEARCH PROJECT' ON
I:t-fPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz 'Engineering Laboratory
Memorandum No. M-5
Lehig~ University, December 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP r ' Fritz Engineering LaboratoryMemorandum No. M-6
L~high' University, ~ebruary 1960
Rere.renees (C':~,
(8) Weiss, W. L.
(9) Herbich" J.' B•..
(10) Herbich, J. Bo
(11) Herbich, J. B.
(12) Herblch, J. B.
Waddihgton-,.W'.Mo'
(13) Herbich, J. B.
. Fong; J. _,L.
(14) Iversen, H. W.
Rolling, R. E.
Carlson, J. ~.'
-·7
SUGGESTED DESIGN CHANGES FOR A
.CENTRIFUGAL PUMP IMPELLER
HANDLING DREDGED MUD
Fritz Engineering Laboratory
Special Report
Lehigh University, November 1959
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING D:ESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M=8
Lehigh University,March 1960
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-9
Lehigh University, April 1960
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVINGJ~E3IGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M=12
Lehigh University, May 1960
ANALYSIS OF HIGH=SPEED MOVIES OF A
MODEL puMp,;
Fritz Engineering Laboratory
Memorandum No. M~ll
Lehigh University, June 1960
STATUS REPORT OF RESEARCH PROJECT,ON
IMPROYING DESIGN OF A HOPPER DREDGE
. PUMP. Fritz Engineering Laboratory
Memorandum No. M~13
Lehigh University, July 1960
.VOLUTE PRESSURE DISTRIBUTION, RADIAL
FORCE ON THE IMPELLER, and VOLUTE MIX-
·ING LOSSES OF A RADIAL FLOW CENTRI-
FUGAL PUMP.
ASME Paper No. 59-Hyd-10,
Journal of Basic Engineering, 1959
References
(15) Herbich, J. B.
Long, J.L.
STATUS REPORT OF RESEARCH PROJECT ON
IMPROVING DESIGN OF A HOPPER DREDGE
PUMP. Fritz Engineering Laboratory
Memorandum No. M-14
Lehigh University, August 1960
A P PEN D I X
•. I
Tables I - IV
TABLE I - EFFICIENCY COMPARISONS FOR VARIOUS IMPELLERS
-
Concentration = 1170 grams/liter
Impeller No. 1 Impe ller No. 5 Impeller No. 6Speed Eff~: , Disch. Eff. Disch. Eff. Disch.(rpm) (% ) ( gpm) (%) (gpm) (% ) (gpm)
1150 75.12 1200 77.0 800 79.5 1000
1300 76.10 1000 79.6 1000 80.4 1000
1440 76.10 1000 81.3 1200 82.7 1200
1550 75.5 800 81.0 800 84.8 800
1650 66.4 800 80.0 1000 81.0 1200
1750 67.8 1000 79.0 1200 80.1 1200
1900 67.2 800 73.2 8'00 73.9 800
'.- ;.
,;'.,;
TABLE II - EFFICIENCY COMPARISONS FOR VARIOUS IMPELLERS
Concentration = 1240 grams/liter
Impeller No. 1 Impeller No. 5 Impeller No. 6
Speed Eff. Disch. Eff. Disch. Eff. Disch.(rpm) (%) (gpm) (%) (gpm) (%) (gpm),
1150 69.8 1000 80.6 1200 78.1 800
1300 68.0 1000 80.5 1000 80.0 800
1440 71.2 1000 83.5 1000 82.0 1000
1550 68.5 1000 80.6 1000 81.5 1000
,1650 68.3 800 80.0 1000 78.5 1200
1750 66.3 1000 77.9 1000 77.3 1000
TABLE III - EFFICIENCY COMPARISONS FOR VARIOUS IMPELLERS
Concentration = 1320 grams/liter !
Speed Impeller No. 1 Impeller No. 5 Impeller No. 6
(rpm) Eff. Disch. Eff. Disch. Eff. Disch.(%) (gpm) (%) ( gpm) (% ) (gpm)
1150 66.1 1000 76.7 800 77.7 800
& 1000
1300 70.3 1000 80.8 1200 80.4 1000
1440 70.5 1000 82.3 1200 80.8 1000
1550 65.7 1000 79.8 1000 80.8 1000
1650 66.7 1000 78.0 1000 77.5 1000
1750 63.8 600 77.1 1000 76.4 1000
, TABLE VI - 'EFFICIENCY COMPARISONS FOR VARIOUS IMPELLERS
Concentration = 1380 grams/liter
Speed Impe ller No. 1 Impeller No. 5 Impeller No. 6Eff. Disch. Eff. Diach. Eff. Disch.(rpm) (%) ( gpm) (% ) (gpm) (%) (gpm)
·1150 76.9 800 77.4 1000
1300 76.1 800 79.7 1000
1440 74.5 800 78.1 800
1550 74.4 800 77.5 1000
& 1000
1650 72.3 1000 77.1 1000 .


Status report on research project on improving design of a hopper dredge pump, September 1960

Kazan Federal University Digital Repository

Materials Research Society Symposium Proceedings 2010 vol.1227, pages 19-30Length and time scales of entanglement andconfinement effects constraining polymer chaindynamicsKimmich R., Fatkullin N.Kazan Federal University, 420008, Kremlevskaya 18, Kazan, RussiaAbstractWith characteristic time constants for polymer dynamics, namely τs (the segment fluctuationtime), τe (the entanglement time), and τR (the longest Rouse relaxation time), the time scalesof particular interest (i) τ < τss (ii) τS < t < τe, and (iii) τe < t < τR will be discussed andcompared with experimental data. These ranges correspond to the chain-mode length scales (i)ℓ < b, (ii) b < ℓ < d2 /b, and (iii) d2/b < ℓ < L, where b is the statistical segment length, d is thedimension of constraints by entanglements and/or confinement, and L is the chain contourlength. Based on Langevin-type equations-of-motion coarse-grained predictions for the mean-squared segment displacement and the spin-lattice relaxation dispersion will be outlined for thescenarios "freely-draining", "entangled", and "confined". In the discussion we will  juxtapose"local" versus "global" dynamics on the one hand, and "bulk" versus "confined" systems on theother. © 2010 Materials Research Society.

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