×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Reynols number

## Reynols number

(OP)
Does anybody know if it is possible to calculate the Reynolds number without velocity or flow rate?

### RE: Reynols number

Reynolds number is defined as:
1) (flow speed)*(length of interest)/(kinematic velocity of fluid)
or
2) (density of fluid)*(flow speed)*(length of interest)/(dynamic velocity of fluid)

Figure out another method to calculate kinematic or dynamic velocity (or flow) without using other unknown terms.

Converting energy to motion for more than half a century

### RE: Reynols number

No doubt. It depends on where you are starting from and where you are trying to go. Manipulation of other dimensionless number can help to get there. What are you trying to accomplish? What do you know about the problem?

### RE: Reynols number

(OP)
Thank you all for taking the trouble in answering my question regarding Reynolds number.
I plucked up courage and went to AI. It appears that it is not possible to calculate Reynolds number without rate of flow, or velocity.

### RE: Reynols number

We are surely doomed if the authority is now an AI.

### RE: Reynols number

Gr8blu, not kinematic velocity but kinematic viscosity, etc. for dynamic viscosity.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!