00:01
First we will calculate initial velocity of water which can be written as v1 is equal to discharge divided by a1 so it can be written as 4 multiplied by q divided by pi d1 square now we will put all these values 4 multiplied by the value of q is 0 .75 feet cube per second divided by pi multiplied by the diameter is given as 3 inch which can be converted into feet by 2 dividing with 12th of so 3 divided by 12 whole square so it will come out to be 15 .289 15 .289 feet per second now we will calculate the final velocity this is initial velocity now we'll calculate final velocity v2 will be q divided by 8 2 so same 4 q divided by pi d2 square so it will come out to be 4 multiplied by 0 .75 divided by pi multiplied by d2 d2 is 1 inch visage 1 by 12 feet is square so it will come out to be 137 .151 feet per second now obtain the value of dynamic viscosity at 68 degree for a fahrenheit from from from water and property of water travel so at t is equals to 68 degree 4 and height mu will be equals to 1 .08 multiplied by 10 to the power of minus 5 feet square per second now reynolds number renaud's number renaud's number renaud's to row v1 d1 divided by new 1 so we have v1 as 15 .3 multiplied by d1 as 3 divided by 1 .08 multiplied by 10 to the power of minus 5 so it will come out to be 3 .3 .54 multiplied by 10 to the power of 5 which is greater than 2300 hence hence and flow is turbulent flow is turbulent turbulent turbulent now obtain the friction factor value from fiction factor for fully developed flow in circular pipe in figure 8 .13 at reynolds number of itna and at reynolds number of 3 .54 into 10 to the power of 5 and eyd ratio of 0 .004 consigned value.
02:49
So from from figure we gate from figure at re is equals to 3 .54 multiplied by 10 to the power of 5.
03:11
Comma e by d is equal to 0 .004 we have we have we have friction factor f is equals to 0 .029 also also also from minor loss coefficient for pipe entrance also from table 8 .2 we have k a is equal to 0 .5 now calculate the major loss in pipe.
03:50
Major loss in pipe, hl or hf is equals to flv squared divided by 2d.
03:57
So it will be f is 0 .029.
04:02
Length is 250 multiplied by d is fv is 15 .15 .3.
04:15
Whole square divided by 2 multiplied by the diameter is 3.
04:21
Inch three feet three inch which can be converted into two feet by dividing by two so from here we get h f is equals to three thousand three hundred ninety four three hundred ninety four point three one feet so this is the this is the major head loss due to frix now we will calculate the minor head loss that is hm will be equal to hm will be equals to v1 square multiplied by k e plus plus 4 kc plus 1 plus kn multiplied by v squared divided by 2.
05:16
So from here we get hm is equal to hm is equal to 15 .3 square squared multiplied by 0 .5 plus 4 multiplied by 0 .5 plus 0 .02 multiplied by 1 .37 .51 squared by 2...