We were discussing theÂ concept ofÂ laminar and turbulent flow,Â Reynolds experiment,Â frictional loss in pipes, derivation ofÂ expression for loss of head due to friction in pipes,Â co-efficient of friction in terms of shear stress,Â basics of shear stress in turbulent flow,Â minor head losses in pipe flow, hydraulic gradient and total energy line, basic concept andÂ working of syphonÂ and alsoÂ theÂ concept ofÂ flow through pipes in series, in the subject of fluid mechanics, in our recent posts.Â

Now we will go ahead to see the, flow through pipes in parallel, in the subject of fluid mechanics, with the help of this post.Â

### Flow through pipes in parallelÂ

When pipes of same lengths and different diameters are connected separately in order to increase the discharge, such arrangement or connection of pipes will be considered as pipes in parallel.Â Â

Let us define the concept of pipes connected in parallel.Â

If a main pipe is divided into two or more than two branches and joined again together downstream to form a single pipe line, such arrangement of connection of pipes will be considered as pipes in parallel.Â

### Important Point:Â Â

The rate of flow or discharge passing through main pipe line will be equal to the sum of discharge through branch pipes.Â

Loss of head for each branch pipe will be same in case of pipes connected in parallel.Â
Loss of head for branch pipe 1 = Loss of head for branch pipe 2Â

Let us see the following figure. Pipe A and pipe B are connected in parallel as displayed here in following figure.Â

Let us consider the following terms from above figureÂ Â

DA and DB: Diameter of pipes A and B respectivelyÂ
QA and QB: Discharge of pipes A and B respectivelyÂ Â

Total discharge through main pipe line = QA + QBÂ

Further we will go ahead to find out the basic concept of flow through branched pipes,Â in the subject of fluid mechanics, with the help of our next post.Â Â

Do you have any suggestions? Please write in comment box.Â

### Reference:Â  Â

Fluid mechanics, By R. K. BansalÂ  Â