In this guide. I will demonstrate how to use the expert Prompting Technique to calculate the required diameter of a pipe given flow rate and velocity.

Navigate to [https://chatgpt.com/c/673db01f-6364-800e-b49e-ebcf1032c83f](https://chatgpt.com/c/673db01f-6364-800e-b49e-ebcf1032c83f)

Enter this prompt that uses Expert Prompting technique. [[By framing the AI as a subject matter expert, Expert Prompting enhances accuracy and relevance. Clear, precise instructions are essential for this technique to work effectively.]]

ChatGPT

Here is the calculation for determining the pipe diameter:

Background

We are calculating the pipe diameter required for a flow rate of 0.2 m³/s while maintaining a velocity of 2 m/s. This calculation ensures compliance with ASME B31.3, which specifies design requirements for process piping.

Objectives
To determine the pipe diameter for the specified flow rate and velocity.
Inputs and Assumptions
Flow rate (
𝑄
Q): 
0.2
 
m
3
/
s
0.2m
3
/s (given)
Velocity (
𝑣
v): 
2
 
m
/
s
2m/s (given)
Formula for pipe cross-sectional area: 
𝐴
=
𝑄
𝑣
A=
v
Q
	​

Pipe diameter relationship: 
𝐴
=
𝜋
𝐷
2
4
A=
4
πD
2
	​

ASME B31.3 guidelines will be followed, assuming a schedule pipe.
Calculation

Determine the cross-sectional area (
𝐴
A):

𝐴
=
𝑄
𝑣
A=
v
Q
	​


Substituting values:

𝐴
=
0.2
 
m
3
/
s
2
 
m
/
s
A=
2m/s
0.2m
3
/s
	​

𝐴
=
0.1
 
m
2
A=0.1m
2

Determine the pipe diameter (
𝐷
D): The area of the pipe is related to the diameter as:

𝐴
=
𝜋
𝐷
2
4
A=
4
πD
2
	​


Rearranging for 
𝐷
D:

𝐷
=
4
𝐴
𝜋
D=
π
4A
	​

	​


Substituting 
𝐴
=
0.1
 
m
2
A=0.1m
2
:

𝐷
=
4
×
0.1
𝜋
D=
π
4×0.1
	​

	​

𝐷
=
0.4
3.1416
D=
3.1416
0.4
	​

	​

𝐷
=
0.1273
D=
0.1273
	​

𝐷
≈
0.357
 
m
D≈0.357m

Convert to standard pipe size: From ASME B31.3, select the nominal pipe size (NPS) that accommodates a diameter of approximately 
0.357
 
m
0.357m. The closest size is NPS 14 (14-inch pipe), with an actual diameter of approximately 
0.3556
 
m
0.3556m.

QA/QC Check
Calculation steps verified for mathematical consistency.
ASME B31.3 guidelines reviewed for standard pipe sizes.
Velocity and flow rate match the required conditions.
Conclusion and Recommendation

The calculated pipe diameter is 
0.357
 
m
0.357m. The recommended pipe size is NPS 14 (14-inch), which aligns with ASME B31.3 standards.

References
ASME B31.3: Process Piping.
Standard mathematical formulas for flow rate and velocity relationships.
4o

Expert Prompting ensures calculations are accurate and aligned with industry standards, making it ideal for specialized tasks. However, the effectiveness depends on the clarity of the instructions. [[Expert Prompting bridges basic AI responses and domain expertise. To learn how step-by-step reasoning can improve accuracy, watch the next video on Zero-shot Chain-of-Thought Prompting. Subscribe to our Youtube channel and our Udemy course to learn more about using AI in your engineering workflow.]]

Chatgpt

This guide offers valuable insights into effectively utilizing ChatGPT through expert prompting techniques, enhancing your ability to generate high-quality responses. By following the simple steps outlined, you'll learn how to craft prompts that yield more relevant and helpful information. Whether you're a novice or looking to refine your skills, this resource is designed to elevate your interactions with ChatGPT, making it a must-view for anyone seeking to optimize their experience.

Expert Prompting Technique Using ChatGPT