For turbulent flow, the value of Reynolds number is

Options

A. 1. `R_(e)gt 2000`
B. 2. `R_(e) lt 2000`
C. 3. `1000ltR_(e)lt2000`
D. 4. `R_(e) = 1000`

Answer

To solve the question regarding the value of the Reynolds number for turbulent flow, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Reynolds Number**:
The Reynolds number (Re) is a dimensionless quantity used to predict flow patterns in different fluid flow situations. It is defined as:
\[ Re = \frac{\rho V D}{\mu} \]
where:
- \(\rho\) = density of the fluid
- \(V\) = velocity of the fluid
- \(D\) = characteristic length (diameter of the pipe)
- \(\mu\) = dynamic viscosity of the fluid

2. **Identify Flow Types Based on Reynolds Number**:
- For laminar flow, the Reynolds number is typically between 0 and 2000.
- For turbulent flow, the Reynolds number is generally greater than 2000.

3. **Determine the Threshold for Turbulent Flow**:
Since the question specifically asks for the value of the Reynolds number that indicates turbulent flow, we refer to the established threshold.

4. **Conclude the Value for Turbulent Flow**:
Based on the information, we conclude that for turbulent flow, the Reynolds number must be greater than 2000.

5. **Select the Correct Answer**:
Therefore, the correct answer to the question is that for turbulent flow, the value of the Reynolds number is greater than 2000.

### Final Answer:
The value of Reynolds number for turbulent flow is greater than 2000.

---