Question

Consider the following statements:
1. There is no flow across a streamline.
2. Streamline spacing varies directly with velocity at the section.
3. Streamlines do not cross.
4. In steady flow, streamline pattern does not change with time.

Which of these statements in respect of stream flow pattern are correct?

• A. 1,2,3 and 4
• B. 1 and 2 only
• C. 1, 3, and 4 only
• D. 2, 3 and 4 only

Answer 1

The correct option is C 1, 3, and 4 only

(c)


The space between the streamlines ${\psi }_{1}and{\psi }_2$ shows the discharge per unit width. As the space between the streamline increases velocity decreases so the discharge remains same. So streamline spacing is inversely proportional to velocity. Thus statement 2 is incorrect.