To ensure turbulent conditions and minimum mixing time during agitation with a turbine impeller, the Reynolds number must be at least 104. (a) A stirred laboratory-scale fermenter with a turbine impeller 5 cm in diameter is operated at 800 rpm. If the density of broth being stirred is close to that of water, what is the upper limit for viscosity of the suspension if adequate mixing is to be maintained? (b) The mixing system is scaled up so the tank and impeller are 15 times the diameter of the laboratory equipment. The stirrer in the large vessel is operated so that the stirrer tip speed (tip speed=nN,D.) is the same as in the laboratory apparatus. How does scale-up affect the maximum viscosity allowable for maintenance of turbulent mixing conditions?

Q: A tank shaped like a vertical cylinder initially contains water to a depth of 9m. The bottom plug is…

A:

Q: Q1/ A ball thrown horizontally with velocity of magnitude 2.5m/s. Find its position and velocity…

A: The magnitude of velocity of ball is, The time is,

Q: A fluid is flowing in a glass pipe at a rate of 0.624 kg/s. The pipe has a diameter of 58.8 mm. If…

A:

Q: / Mec The unit of the time constant of any first-order system is O a. minutes O b. sec1 c. degree…

A:

Q: A double differential manometer is used to measure the difference in pressure at two points A and B…

A:

Q: A pressure difference of 2.40 x 10 Pa is used to inject a sample onto a 64.2 cm long capillary that…

A: It is given that,pressure difference, ,length of capillary, ,diameter, viscosity of the sample,

Q: While driving down the highway you notice that your speedometer reads 50 miles/hr and 80 km/hr.…

A: The faster speed out of the 2 given options is to be chosen.

Q: Find the pressure in the water pipe shown in Fig. P2.40.

A:

Q: l Verizon 92% 11:26 PM Done Reynolds number a dimensionless number. It is defined as, Re = Where, p…

A: Hello. Since second sub-part of your question does not provide the value of Reynolds number which is…

Q: 5.31.* The venturi has meter in air flowing it. The through manometer, as shown, contains both…

A: It is given that air is flowing in the venturi meter.Given data are as follows:Inlet area of venturi…

Q: he density of a crude oil is 53.1 Ibm/ft3 at 68 F and its iscosity is 32.8 lbm/(ft-hr). What is the…

A:

Q: A set of pumps need to be installed to transfer liquid from a storage tank into a distillation…

A: When installing pumps to transfer liquid from a storage tank into a distillation column, there are…

Q: 3.53. WP Two mercury manometers, one open-end and the other sealed-end, are attached to an air duct.…

A: The absolute pressure, gauge pressure, and atmospheric pressure are to be calculated for the above…

Hazard Analysis and Design in Chemical Engineering

Hazard is the intrinsic property of a material or process which harms the people, buildings, or environment. Health, safety, hazard, risk assessment, loss prevention, and environmental consideration play an important role while designing a chemical processing plant. Hazard is often confused with risk. Risk measures the magnitude of loss and injury of likelihood incidents or the consequence and frequency of incidents.