Group 3 of fluid mechanics class

We are civil engineering students from UTHM, Malaysia. We create this blog for academic propose. Our group would like to explain and teach about the basic equations in fluid mechanics.


Group member:

PANG WEI KEN

GROUP LEADER

BIODATA http://fluidbloggroup3.blogspot.com/2014/05/pg2-biodata-pangken.html

OH JOO SENG

SECRETARY

BIODATA http://fluidbloggroup3.blogspot.com/2014/05/pg2-biodata-jooseng.html

ONG JUN XANG

COMMITTEE MEMBER

BIODATA http://fluidbloggroup3.blogspot.com/2014/05/pg2-biodata-junxiang.html

SII HO LUNG

COMMITTEE MEMBER

BIODATA http://fluidbloggroup3.blogspot.com/2014/05/pg2-biodata-sii-ho-lung.html

TAN SIE SHEN

COMMITTEE MEMBER

BIODATA http://fluidbloggroup3.blogspot.com/2014/05/pg2-biodata-sie-shen.html

Our minutes of meeting: http://fluidbloggroup3.blogspot.com/2014/05/fluid-blog.html

Finally, let start our lesson http://fluidbloggroup3.blogspot.com/2014/05/introduction.html

3.5 Equation of continuity

The equation of continuity works under the assumption that the flow in will equal the flow out. This can be useful to solve for many properties of the fluid and its motion :

Flow in = Flow out

Using the known properties of a fluid in one condition, we can use the continuity equation to solve for the properties of the same fluid under other conditions.

This can be expressed in many ways, for example: A1V1 =A2V2. The equation of continuity applies to any incompressible fluid. Since the fluid cannot be compressed (ρ= constant), the amount of fluid which flows into a surface must equal the amount flowing out of the surface.

The Equation of Continuity in compressible flow can be expressed as:

m = ρ_i1 v_i1 A_i1 + ρ_i2 v_i2 A_i2 +...+ ρ_in v_in A_in

    = ρ_o1 v_o1 A_o1 + ρ_o2 v_o2 A_o2 +...+ ρ_out v_out A_out           

where                     

m = mass flow rate (kg/s)

ρ = density (kg/m³)

v = speed (m/s)

A = area (m²)

Next bernoulli's equation http://fluidbloggroup3.blogspot.com/2014/05/fluid-bernoullis-equation.html