Calculate forces related to fluids at rest and in motion

Reference no: EM133178789

N5E43 Hydraulics - Level 4 and Level 5 Higher National Diploma Construction and The Built Environment

Assignment - Hydrostatic problems and selecting suitable pipe sizes

Learning Outcome 1: Apply concepts of physics to develop solutions to hydrostatic and hydrodynamic problems
Learning Outcome 2: Calculate forces related to fluids at rest and in motion

Assignment Brief and Guidance:

Scenario
You have recently been appointed as an assistant civil engineer, working for a multi-disciplinary medium-sized practice. Your initial training period will be spent working in the hydraulics section of the company. As such you have been asked to study the concepts of physics that relate to hydrostatic and hydrodynamic problems. You have also been set a range of calculations to complete to demonstrate your understanding and knowledge.

Part A Hydrostatic Solutions

Task 1 - Explain hydrostatic pressure and identify the hydrostatic pressure formula prior to answering the following task. There is a fluid flow between two parallel plates 80mm apart. The velocities of the flow were found by direct measurement as the table below:

Plot the velocity distribution curve and determine the mean velocity of the flow and comment the flow condition and characteristics of the flow. If the fluid flow is a turbulent flow, use a diagram or model to illustrate the flow.

A vertical gate of 5m height and 3 m wide closes a tunnel running full of water. The pressure at the bottom of the gate is 195 kN/m2. Determine the total pressure on the gate and position of the centre of the pressure and the parameters of the problem using standard engineering notation. Illustrate the proposed solution using a scaled drawing.

Task 2 - The properties of a fluid have a major impact on the fluid flow conditions. Explain how the fluid properties such as density and viscosity are used to calculate the Reynolds number. How does the viscosity of a fluid impact on the boundary layer?

Explain the difference between viscous, laminar, transitional and turbulent flow and how this relates to the Reynolds number, demonstrating this link using illustrations or models.

Part B - Hydraulic Solutions Task 3
a) Determine the friction factor with Darcy-Weisback equation for water flowing through a 300mm diameter pipe with water flow rate at 0.2m³/s and 120m long pipe run under a pressure difference of 3.8m head.

b) An open channel for storm water discharge system with a cross-section of trapezium shape with a bottom width of 4m and side slopes of 1 vertical to 1.5 horizontal. Assume the roughness coefficient n is 0.025, the bed slope is 1/1800 and the depth of the water is 1.2m. Determine the volume rate with Manning formula.

Attachment:- Hydraulics.rar

Reference no: EM133178789

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