Mechanical Engineering - Hydraulics and Fluid Mechanics - Discussion

Discussion Forum : Hydraulics and Fluid Mechanics - Section 1 (Q.No. 3)
3.
In a depressed nappe
the pressure below the nappe is atmospheric
the pressure below the nappe is negative
the pressure above the nappe is atmospheric
the pressure above the nappe is negative
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
25 comments Page 2 of 3.

Biradar yogesh said:   1 decade ago
Half of double cone is called nappe.

Rajendra Singh said:   1 decade ago
Because pressure toward downward direction is positive and toward upward direction is negative.

Rahul kumar said:   1 decade ago
Sometimes a weir is not fully ventilated, but is partially ventilated as shown in fig-2 (b). If the pressure below the nappe is negative, it is called a depressed nappe. The discharge of the nappe, in this case, depends upon the amount of ventilation and the negative pressure.

Generally, the discharge of a depressed nappe is 6% to 7% more than that of a free nappe. I hope it'll help you.

Gurmeet Singh said:   10 years ago
What is the means of negative pressure?

Sam said:   10 years ago
Which is the correct answer?

Saravanan said:   9 years ago
What is nappe?
(1)

Dad said:   9 years ago
What is the use of nappe and weir?

Leghari said:   9 years ago
I confused about nappe. Please explain it.

Suchitra said:   9 years ago
Thanks @Rohit Sjrs.

Dinesh said:   8 years ago
How it's negative. Can someone explain please?


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