Prediction of batch heat transfer coefficients for pseudoplastic fluids ...
Prediction of batch heat transfer coefficients for pseudoplastic fluids ... Prediction of batch heat transfer coefficients for pseudoplastic fluids ...
CHAPTER 2 R,EVIE\rJ OF B,ACKGROD1m l1ATERIAL PSEUDO PLASTIC FLUIDS -< -.' "- - - • wnile Newtonian behavior is only one of many rheological types, the large majority of fluids h~~dled industrially are Newtonian. Pseudoplastic fluids are second in i1nportance to the NeHtonians (118).. The Bingham plas tics are probably third in importance but many of these have been treated as pseudoplastics (126). There are very few industrial dilatants, and the time dependent and viscoelastic fluid groups are small 8nd are often treated as pseudoplastics (7, 118, 120, 121, 126, 128, 179, 186). Pseudoplastic fluids l.Jere studied in this Hork because of their relative importance. ~1elts a..Yld sol'll'tions of substances Hi th high mole cular weight are usually pseudoplastic (118, 196) .. Suspensions of asymmetrie solids are often in this category. (120, 213). Typical examples of pseudoplastics are polystyrene, copolymers of styrene, low and high pressure polyethylene, rubber modified styrene polymers, and slurries of cement rock in water (96, 212). The flm ..! behavior of pseudop1astic fluids is shov.ffi graphically in Figure 2-1. At very lov.T a..Yld very high shear rates the apparent viscosity is a constant, as shown in curve A. Thus in these ranges the fluid acts as a Newtonian fluid. BetvJeen these two extremes., hOl
7 A B SLOPE = /'n- .( 10 ~y FIG 2-1 FLOW BEI-IAVIOR OF PS£.UDOPLAST/CS
- Page 1 and 2: Copyright Warning & Restrictions Th
- Page 3 and 4: PREDICTION OF BATCH HEAT TRANSFER C
- Page 5 and 6: while the latter has five to seven
- Page 7 and 8: ACKNOWLEDGEMENTS The auther ex~ress
- Page 9 and 10: Chapter 1: Chapter 2: Introducticm
- Page 11 and 12: LIST OF FIGURES page 2-1 FlGW Behav
- Page 13 and 14: CHAPTER I INTRODUCTION BATCH HEAT T
- Page 15 and 16: 3 as pseudoplasticso Pseudoplastic
- Page 17: 5 ~n addition to studying the effec
- Page 21 and 22: 15.5, 183, 185).. Most of their eff
- Page 23 and 24: va:ry withl. the slaear I'Rte.. 11.
- Page 25 and 26: 13 RHEOLOGIC_~ INVESTIGATION OFPO~~
- Page 27 and 28: IS In(s) (2-8 (2-9 where Re is the
- Page 29 and 30: '7 ft~ easier method of calibrating
- Page 31 and 32: 19 of' thixotropic breakdown l'Ji t
- Page 33 and 34: 21 complicated by a variable viscos
- Page 35 and 36: 2J Schultz-GrQnow (174) used a dime
- Page 37 and 38: 2S The results shm-red that equatio
- Page 39 and 40: Su.bstituti011 of equati 2-22 gives
- Page 41 and 42: 29 In both Newtonian and non-Newton
- Page 43 and 44: 31 for viscous pseudoplas tics at 1
- Page 45 and 46: 33 (2-29 when both the distances ar
- Page 47 and 48: JS Thermometers or thermocouples ar
- Page 49 and 50: .37 2: a in in heat cQ@tent of the
- Page 51 and 52: J9 cooling mediu..:m side, the heat
- Page 53 and 54: 41 ports a value of 3/4-.. He then
- Page 55 and 56: 43 find the effects of one or two o
- Page 57 and 58: 45 The group to the left of the equ
- Page 59 and 60: 47 the highest heat tra...nsfer coe
- Page 61 and 62: 49 A pitched blade turbine gave coe
- Page 63 and 64: SI done on the correlation of heat
- Page 65 and 66: 5J evaluated at the wall temperatur
- Page 67 and 68: ss to (2-46 where ill is the consis
7<br />
A<br />
B<br />
SLOPE = /'n- .( 10<br />
~y<br />
FIG 2-1<br />
FLOW BEI-IAVIOR OF PS£.UDOPLAST/CS
Change language