Nobody downloaded yet

Multiphase Environmental Flows - Essay Example

Comments (0) Cite this document
Summary
Gas solid systems are usually encountered in the industries such as the chemical, petrochemical, pharmaceuticals, food, mineral processing and other industrial setups that convey solid granules using a blast of pressurized air. Pneumatic systems are used for fluid catalytic cracking, mixing, granulation, drying, transport and in mixing of small fine powders through pipes.
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER98.5% of users find it useful
Multiphase Environmental Flows
Read TextPreview

Extract of sample
"Multiphase Environmental Flows"

Download file to see previous pages The other method involves the use of Eulerian/ Lagrangian method in which the particles are treated individually or as a group tracked by the Lagrangian frame of reference. Cundall and Starck developed the discrete element method in 1979 and has been widely used for the study of parcticles in the solid state. Studies conducted using DEM coupled with CFD showed that particles move in plugs along the conveying pipes.
According to Kuang et al (2008), one of the most important technologies in the industry is dense phase pneumatic transportation of bulk material in the slug form. In his research paper, Kuang et al (2008) focuses on the numerical study of the slug flow in horizontal pneumatic conveyor by means of discrete particle simulation. Low velocity and dense gas system are common in industries such as mineral processing, agricultural industries and chemical industries. Slug flow is used in the industry to transport materials from one location to another. The slug flow is particularly considered in industries because of its ability to reduce the degradation of plant and also reduce wear. The power utilization of the system is also superior as compared to other flows. The study and simulation of the slug flow therefore brings into light the nature of flow with the aim of understanding the system and improving it.
According to the research done by Kuang (2008), the particles used were spherical in shape, made of polythene material with a diameter (dp) of the particle density (pp) was 922 Kgm-3.air was used for the gas phase. The viscosity was taken to be and a density of .The underlying equations for particle flow were the rotational and translation motion determined by the Newton's laws of motion given as;
1

And 2

Where mi is the mass, Ii is the momentum or rotation inertia, is the rotational velocity while is the translational velocity of the particles (Kuang et al, 2008). For the gas phase, the gas flow was considered as a continuous phase and the governing equations are as shown below.

3

4

The coupling method used in Kuang (2008) simulations was both DEM and CFD. At an individual particle scale, modeling of the flow was done using DEM while the gas flow modeling was done using CFD. At each step, DEM gave information of the velocity and position of the particles. The data given by DEM was used by CFD to determine the gas flow field; this then yielded the particle fluid forces acting on individual particles. The resulting forces were then incorporated into DEM to yield the next time phase. The simulation test lasted for 15 seconds, numerical flow during the first 2 seconds was not considered in the analysis as only the macroscopically stable slug flow was considered during the simulation. Property mapping due to the many particles that reside in a given cell was done; the mapping technique was used to aid in the correct calculation of particle fluid force acting on the particle. The least square interpolation was used. Based on this interpolation the particle position was given by;

5

Where is the gas properties at the cell center and Is the particle position at the cell center. is The vector denoting the distance from the cell center ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
  • CHICAGO
(“Multiphase Environmental Flows Essay Example | Topics and Well Written Essays - 6500 words”, n.d.)
Multiphase Environmental Flows Essay Example | Topics and Well Written Essays - 6500 words. Retrieved from https://studentshare.org/science/1502335-multiphase-environmental-flows
(Multiphase Environmental Flows Essay Example | Topics and Well Written Essays - 6500 Words)
Multiphase Environmental Flows Essay Example | Topics and Well Written Essays - 6500 Words. https://studentshare.org/science/1502335-multiphase-environmental-flows.
“Multiphase Environmental Flows Essay Example | Topics and Well Written Essays - 6500 Words”, n.d. https://studentshare.org/science/1502335-multiphase-environmental-flows.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Embracing cash flows
...?(Dissertation Proposal Form) Part Some Personal Information Your Email Id: Your Phone Number: Part 2: Topic Area, Key Literature & Conceptual development: 2a: What is the proposed title of your research? “Embracing Cash Flow Ratios for predicting financial future”. 2b: What general areas of research does your topic cover? Importance of Cash flows Process of analysis Drawbacks of financial ratio analysis Relevance of including cash flow ratios into financial statements 2c: What are the key readings for your research? Internet Sources Financial statements of companies Analyst opinions Part 3: Research Questions 3a: What are your research questions likely to be? How and why financial...
3 Pages(750 words)Dissertation
Information Flows and Financial Management
...for Accounts Receivable and Accounts Payable can be developed to know the outstanding against each party, while the totals of each separate transaction can be seen by the posting in the Master Control Ledger for Accounts Receivable and Accounts Payable. At present the last version available is of 2010 and there are deliberations being made by an Executive Steering Committee considering the impact of temporary increase in State sales tax (mosaic.arizona.edu). The decision was supposed to be taken May 19, 2011. However tentative approval has been given to continue with needed changes. Horizontal Flow, Inward-Outward Flow, Vertical Information flow, and Downward Information...
3 Pages(750 words)Coursework
Introduction Chapter for Swirling Flows
...?Running Head: Chapter Introduction Chapter Introduction Chapter Introduction Background of the Research This study is about analysing the various mechanistic behaviours of the swirling flow when released from a jet system inside the state of immersion in water (i.e. a liquid substance). The main focus is on the combustion system characteristics of the swirling flow from a fluid mechanics’ point of view. Introduction to Swirling Flows Swirling flows are generally characterised by the formation of vortex, which can be seen in natural whirlpools, hurricanes, tornados, etc. and also in various engineering applications. [1] Aerodynamic drag induced by lift of the wings of an aircraft may also give rise to swirling flows in air... . In the...
6 Pages(1500 words)Essay
Statements of cash flows
...My Position It is important to cash equivalent as quite different from cash. Moreover, cash equivalent are not only short-term securities but they are liquid. For a case of IFRM it was considered that an investment is cash equivalent only when it has a very short term maturity of three months or fewer months from the time it was acquired. Here, borrowing is considered a financing activity and since overdrafts are borrowings for a short time, they are thus added to cash flow statement. Moreover, they are included in cash flow statement because their payment is based on demand from cash management and thus composes what is called cash and cash equivalent. This explains why bank overdrafts are not part of...
7 Pages(1750 words)Research Paper
Global Media: Flows and Counter-flows
...The world tendency to globalization resulted in formation of network connections that cut across cultural and traditional boundaries. While the obvious layers of connectivity include circulation of goods and capital, the underlying issues can be as deep as formation of identity by global media. The consequence is that culture is no longer a product of a definite territory; shift in relationship between global and local forces changes the way one tends to view culture, society, relations between nations and, finally, own identities. The direct outcome of globalization process is the irrelevance of local characteristics. Global media and capitalist monoculture incorporate all minor cultures into the single global capitalist system... world...
6 Pages(1500 words)Essay
Construction of the cash flows
...INTRODUCTION There often confusion as which money outflow should be included as capital assets and which money outlays are part of operating expenses. Research and development expenses, electricity, water, light and office rent are usual items falling under operating expenses. Here, the proper identification of airline ticket costs are discussed on the basis of capitalization and operating expenses(Rigeorgis, 1995;p31-40) BODY: Theory of Accounts The cash flow statement can be defined as that part of the financial statements that gives information on the total cash receipts ( or inflows) and total cash disbursements ( or outflows) of an enterprise during a particular accounting period which is usually one year. The users... of the...
4 Pages(1000 words)Essay
Reporting and Analyzing Cash Flows
...Cash Flow Analysis and Report Grade Cash Flow Report Profit Expenses Net Sales $ 348 600.00 Depreciation expense $ 25 620.00Cash Collected from sales $ 758 100.00 Other expenses $ 274 995.00 Cost of goods sold $ 409 500.00 Loss on equipment sale $ 1 470.00 Income from operations $ 46 515.00 Equipment Purchase $ 26 775.00 income tax $ 6 615.00 Net Income $ 39 900.00 Borrowed $ 4 200.00 Shares Issued $ 23 100.00 Total Expenses $ 328 860.00 Net Cash After Operations $ 86 940.00 Assets Liabilities Cash $ 95 550.00 Prepaid Expenses $ 11 970.00 Merchandise Inventory $ 318 150.00 Equipment $ 194 775.00 Common shares $ 338 100.00 Accumulated depreciation $ 76 125.00 Retained earning $ 8 505.00 Accounts payable $...
2 Pages(500 words)Assignment
Math Tidal Flows project
...1. Because I cannot type the graph right here, so that I point out all the number for you 2. The graph can be doing from excel Direction: You are a team of consulting engineers studying the flow of water from a certain river into a large lake. You have data in the form of a graph detailing the amount of water that has flowed into the lake from the river over a fourteen-day period. Day billion gallons Day 1 0.5 Day 2 1.1 Day 3 1.5 Day 4 2 Day 5 2.3 Day 6 2.5 Day 7 2.6 Day 8 2.7 Day 9 2.75 Day 10 2.8 Day 11 2.9 Day 12 3 Day 13 3.25 Day 14 3.4 Your job is to report several results to your client as follow: 1. First, determine the total volume of water that has flowed from the river in the first five days of the observation period... ; in the...
3 Pages(750 words)Statistics Project
Cash Flows in Business Organisations
...CASH FLOWS IN BUSINESS ORGANISATIONS Table of Contents Introduction 4 Task 4 Task 2 5 Task 3 6 a. Operating Activities 6 b. Working Capital 7 c. Financing Activities 7 d. Investment Activities 8 Task 4 8 Conclusion 9 References 10 Appendix 11 Table 1- Consolidated Income Statement of US Airways 11 Table 2- Consolidated Statement of Cash Flow of US Airways 11 Table 3- Consolidated Income Statement of United Airlines 13 Table 4- Consolidated Statement of Cash Flow of United Airlines 14 Introduction The Income Statement of a company shows the revenue earned, gross profit, operating profit and net profit for a particular period of time based on ‘accrual accounting’ concept. The true position of cash is reflected from the consolidated... ...
4 Pages(1000 words)Coursework
Statement of Cash Flows
...Importance of ment of Cash Flows Importance of ment of Cash Flows Public firms are required to prepare annual financial reports, which shows their financial positions. Among the statements that must be prepared is the statement of cash flows. Since cash is the lifeblood of any firm and is crucial to the success of any business, the statement of cash flow is a vital source of information. A cash flow statement attempts to answer how a firm used and generated cash during the fiscal period (Harrison, Horngren, & Thomas, 2013). This information is critical to users as it helps them access a particular firm’s ability to generate cash in future. Creditors can...
1 Pages(250 words)Assignment
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic Multiphase Environmental Flows for FREE!
Contact Us