00:01
The air temperature is 40 degree celsius.
00:05
The velocity is 7 meter per second.
00:09
Prandtl number pr is equal to 0 .7255.
00:16
Then we have thermal conductivity k as 0 .02662 watt per meter kelvin.
00:25
Then v is equal to 1 .702 into 10 to the power minus 5 meter square per second.
00:37
Length of the plate l is 5 meter.
00:41
Width of the plate is 4 meter.
00:44
And the surface temperature is equal to 80 degree celsius.
00:51
Now since the flow is laminar, the reynolds number should be less than 4 laminar flow.
01:04
The reynolds number should be less than 5 into 10 to the power 5.
01:11
So let us calculate the reynolds number.
01:14
So reynolds number is equal to vl over v.
01:19
So v is the velocity, it is 7.
01:22
And then we have length which is small l equals to 5 divided by v which is 1 .702 into 10 to the power minus 5.
01:33
When we solve this, we have the reynolds number as 20 .56 into 10 to the power.
01:45
Now since reynolds number is greater than 5 into 10 to the power 5, therefore we can say that the flow is turbulent.
01:58
So we have a turbulent.
02:03
Now we will use critical reynolds number to find out the length up to which the flow is laminar...