Consider the following velocity profiles measured in the lower atmosphere above the soil and in a river above the sediment-water interface. Estimate the friction velocity and roughness height at the interfaces. Velocity in air m/s Velocity in river m/s Elevation above interface 1 m 2.3 0.12 2 m 3.0 0.13 5 m 3.9 0.16 10 m 4.6 0.17

Consider the following velocity profiles measured in the lower atmosphere above the soil and in a river above the sediment-water interface. Estimate the friction velocity and roughness height at the interfaces. Velocity in air m/s Velocity in river m/s Elevation above interface 1 m 2.3 0.12 2 m 3.0 0.13 5 m 3.9 0.16 10 m 4.6 0.17

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

1. Water 3m/s 75mm Þ Determine mass flow rate [13.26 kg/s] 2. Oil RD = 0.86 +17 kg/s 100mm Þ Determine velocity [2.52 m/s] Given viscosities of water and oil are 0.001 Ns/m² and 0.03 Ns/m² respectively, determine the Reynolds number in examples 1. and 2. [2.25 X 10°, 7224] 3.
A 15-kg solid cylinder rolls without slipping down the incline (30° with the horizontal). Determine the acceleration of point G. in the center of the cylinder. 5.66 m/s^2 O 7.83 m/s^2 O 6.32 m/s^2 O 3.27 m/s^2
A plate 0.05 mm distant from a fixed plate moves at 1.2 m/sec and requires a shear stress of 2.2 N/m² to maintain this velocity. Find the viscosity of the fluid between the plates.
III. PROBLEM SOLVING 36. To measure a base line, a steel tape 30 m long, standardised at 15° C with a pull of 80 N was used. Find the correction per tape length, if the temperature at the time of measurement is 25° C and the pull exerted is 150 N. Take Young's modulus E = 2 × 10^5 N/mm2 and coefficient of thermal expansion a = 11.2 × 10^6/°C. Cross-sectional area of tape is 8 mm2.
A block(unit weight = 19.5 kN/m^3) 0.51m square and 331mm deep floats on a stratified liquid composed of a 200mm layer of water above a layer of mercury(s.g. = 13.6). If a downward force of 1200 N is applied to the center of mass of this block, what is the new position of the bottom of the block relative to the mercury surface in mm?. Write numerical value only and in 2 decimal places.
If the velocity profile of a fluid over a plate is parabolic with free stream velocity of 120 cm/sec occuring at 20 cm from the plate, calculate the velocity gradients and shear stress at a distance of 0, 10 and 20 cm from the plate. Take the viscosity of the fluid as 8.5 poise. Solution:
Consider a large cubic ice block floating in seawater. The specific gravities of ice and seawater are 0.92 and 1.025, respectively. If a 15-cm-high portion of the ice block extends above the surface of the water, determine the height of the ice block below of the surface. Sea Ice block W FB
A plate 0.035mm distant from a fixed plate, moves at 80 cm/s and shear stress is 2 N/m2 to maintain this speed. Determine the fluid viscosity between the plates.
Which parameters do Barometer and Manometer measure? o Pressure difference; Atmospheric pressure o Pressure difference; Absolute pressure o Absolute pressure; Pressure difference o Atmospheric pressure; Pressure difference • What is the absolute pressure at location 1 (P1)? Ga OP = Pan + Pgh OP = Pan OP, - Pgh OP can not be calculated
9.29) Fluid flows in a very smooth cylindrical pipe at Reynolds number 50 000. Using the velocity distribution of equation 9.27 and the methods of Section 9.3, determine the thickness of the viscous sublayer as a percentage of the pipe radius.
2. A 25-mm diameter shaft with density 7,870 kg/m³ is pulled through a cylindrical bore as shown. Oil with a kinematic viscosity of 8.2 104 m²/s and SG-0.89 fills the 0.3-mm gap between the shaft and the bore. Find the magnitude of the force P required to pull the rod through the bore with a constant speed of 2.5 m/s. 0.5 m 15°
60.0° 40.0° T T2 T3 g A bag of cement weighing 325 N hangs in equilibrium from three wires as suggested in the figure. Assuming that the system in equilibrium, what are the tensions T1, T2, and T3 in the wires? CEMENT