1. Find potential of point<br> A

Consider incompressible flow in a circular channel. Derive general expressions for Reynolds number in terms of (a) volume flow r

Georgia [21]

Answer:

a) $Re = \frac{4\cdot \rho \cdot Q}{\pi\cdot \mu\cdot D}$ , b) $Re = \frac{4\cdot \dot m}{\pi\cdot \mu\cdot D}$ , c) 1600

Explanation:

a) The Reynolds Number is modelled after the following formula:

$Re = \frac{\rho \cdot v \cdot D}{\mu}$

Where:

$\rho$ - Fluid density.

$\mu$ - Dynamics viscosity.

$D$ - Diameter of the tube.

$v$ - Fluid speed.

The formula can be expanded as follows:

$Re = \frac{\rho \cdot \frac{4Q}{\pi\cdot D^{2}}\cdot D }{\mu}$

$Re = \frac{4\cdot \rho \cdot Q}{\pi\cdot \mu\cdot D}$

b) The Reynolds Number has this alternative form:

$Re = \frac{4\cdot \dot m}{\pi\cdot \mu\cdot D}$

c) Since the diameter is the same than original tube, the Reynolds number is 1600.

8 0

3 years ago

Steam enters an adiabatic nozzle at l MPa, 260 C, 30 m/s and exits at 0.3 MPa and 160 'C. Calculate the velocity at the exit.

maxonik [38]

Answer:

v₂ = 35.57 m/s

Explanation:

Given :

Inlet steam pressure, P₁ = 1 MPa

Inlet steam temperature, T₁ = 260°C

Inlet velocity of steam, V₁ = 30 m/s

Outlet steam pressure, P₂ = 0.3 MPa

Outlet steam temperature, T₂ = 160°C

Now,

From steam table at pressure 1 Mpa and temperature 260°C, enthalpy, h₁ = 2964.8 kJ/kg

From steam table at pressure 0.3 Mpa and temperature 160°C, enthalpy, h₂ = 2782.14 kJ/kg

Therefore, for an open system from 1st law of thermodynamics, we get

Energy in = Energy out

E₁ = E₂

$\left ( h_{1}+\frac{v_{1}^{2}}{2} \right )$ = $\left ( h_{2}+\frac{v_{2}^{2}}{2} \right )$

$v_{2}^{2}= 2\left [ h_{1}-h_{2}+\frac{v_{1}^{2}}{2} \right ]$

$v_{2}^{2}= 2\left [ 2964.8-2782.14+\frac{30^{2}}{2} \right ]$

$v_{2}^{2}=$ 2 X 632.66

v₂ = 35.57 m/s

Therefore, outlet velocity, v₂ = 35.57 m/s

7 0

3 years ago

If a ball is dropped from a height (H) its velocity will increase until it hits the ground (assuming that aerodynamic drag due

enot [183]

Answer

Explanation:

so the velocity is 39 feet per sec so the impact is 720 cm from the ground

take 720 * 39 sq

4 0

4 years ago

How Do Solar Engineers Help Our Everyday Life? <br> (2 or more sentences please)

scZoUnD [109]

Answer:

Solar engineers plan, design, and implement solar energy projects. They may manage anything from large-scale municipal projects to home rooftop installations. He or she may also oversee or manage implementation of the plan. Solar engineers may also need to report on the efficiency, cost, and safety of the project.

5 0

3 years ago

By using a book of the OHS Act, Act 85 of 1993, find the act or regulation where the following extraction comes from "every empl

AnnyKZ [126]

Answer:

Is very important to employ safety and care

For every staff

Is very necessary is protected

Her is going very high stage

Because of every one say that this company is best for others company

Is reason safety is very important in our life

3 0

3 years ago

1. Find potential of point A