Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Chemical Engineering Expert

Background In gas-­-solid fluidization, it is often common to have a wide size distribution of particles present in the system. During fluidization the smaller particles may be entrained from the fluidization column. Sometimes it is useful to know the maximum particle size that would be elutriated from the system. In order to do this the equation for the terminal velocity can be used as shown below.

 ut =√ (4/3 dp (ρp − ρf)g)/ρfCD

where

ut is the terminal velocity (m/s)

dp is the particle diameter (m)

ρp is the particle density (kg/m3)

ρf is the fluid density (kg/m3)

g is the gravitational constant (9.81 m/s2)

CD is the drag coefficient.

According to Haider and Levenspiel (1989) a single correlation for the drag coefficient for all flow regimes and non-­-spherical particles is described as follows.

CD = 24/(Re)p [1+ (8.1716e−4.0655Φ )(Re)p0.0964+0.5565Φ]+(73.69(e−5.0748Φ )(Re)p)/((Re)p + 5.378e6.2122Φ)

Where

Φ is the particle sphericity

(Re)p is the particle Reynolds Number

(Re)p is defined as

(Re)p = utdpρf

Where

μ is the fluid viscosity (kg/m-s)

Task

The task for this assignment is to solve for the particle diameter (dP), in μm, at different terminal gas velocities (ut) between 0 and 1 m/s. The solution should be solved in Microsoft Excel using VBA. The solution should be flexible and robust enough that different parameters (e.g. particle density, sphericity) could be easily changed and a new solution is automatically find outd. The root finding method should also be able to be easily adapted to handle different nonlinear problems.

For this problem the following parameters will be used.

ρp      950              kg/m3

Φ    0.77

ρf      1.184           kg/m3

μ       1.85×10-5    kg/m-s

Chemical Engineering, Engineering

  • Category:- Chemical Engineering
  • Reference No.:- M92009

Have any Question? 


Related Questions in Chemical Engineering

A wing generates a lift l when moving through sea-level air

A wing generates a lift L when moving through sea-level air with a velocity U. How fast must the wing move through the air at an altitude of 35,000 ft if it is to generate the same lift? (Assume the lift coefficient is c ...

A well is producing from a saturated oilreservoir with an

A well is producing from a saturated oilreservoir with an average reservoir pressureof 3000 psig. Stabilized flow test dataindicates that the well is capable of producing400 STB/day at a bottom-holeflowing pressure of 25 ...

Question 1 a give three examples for each of natural free

Question 1. (a) Give three examples for each of natural (free) convection and forced convection which occur in industrial processes. (b) The Grashof number and the Reynolds number appear in most correlations of experimen ...

Current and charge in a battery consider a car battery

Current and charge in a battery. Consider a car battery rated at 100 A· h. This battery can supply a current of 100 A for an hour. (a) How much charge can the battery supply? (b) What must be the area of a parallel plate ...

For the inertial system governed by the differential

For the inertial system governed by the differential equation design a feedback controller to stabilize the system and reduce the percentage overshoot below 10% with a settling time of less than 4 s.

Write a computer program that implements the estimation of

Write a computer program that implements the estimation of a first-orderplus-dead-time transfer function with the tangent method and then determine the PID parameters using the Ziegler-Nichols formula. Apply the program ...

Show that the bilinear transformation of a pd controller

Show that the bilinear transformation of a PD controller with a high-frequency pole that makes the controller transfer function proper does not yield a pole at z = -1.

A solar collector design consists of an inner tube enclosed

A solar collector design consists of an inner tube enclosed concentrically in an outer tube that is transparent to solar radiation. The tubes are thin walled with inner and outer diameters of 0.10 and 0.15 m, respectivel ...

A pesticide inhibits the activity of a particular enzyme

A pesticide inhibits the activity of a particular enzyme, which can therefore be used to assay for the presence of the pesticide in an unknown sample. a) In the laboratory, the initial rate data shown in the table below ...

A potential flow source having an intensity of 10m2s placed

A potential flow source having an intensity of 10m2/s, placed in the point of Cartesian coordinates (1;0), and a sink having identical intensity, placed in the point (-1;0), are combined with a uniform flow at 25 m/s, in ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen