The image above represents dimensionless radius. Two essential parameters are needed to calculate the dimensionless radius: external radius (re) and well radius (rw).
The formula for calculating the dimensionless radius:
rDÂ =Â re / rw
Where;
rDÂ = Dimensionless Radius
And re = External Radius
rw = Well Radius
Let’s solve an example;
Given that the external radius is 18 and the well radius is 16.
Find the dimensionless radius?
Hence, this implies that;
re = External Radius = 18
rw = Well Radius = 16
That is, rDÂ =Â re / rw
rDÂ =Â 18 / 16
rD = 1.125
Therefore, the dimensionless radius is 1.125.
Calculating for the External Radius when the Dimensionless Radius and the Well Radius are Given
re = rD x rw
Where;
re = External Radius
rDÂ = Dimensionless Radius
rw = Well Radius
Let’s solve an example;
Given that the dimensionless radius is 9 and the well radius is 20.
Find the external radius?
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This implies that;
So, rD = Dimensionless Radius = 9
rw = Well Radius = 20
Then, re = rD x rw
re = 9 x 20
re = 180
Therefore, the external radius is 180.
Â
Calculating for the Well Radius when the Dimensionless Radius and the External Radius
rw = re / rD
Where;
rw = Well Radius
Then, rD = Dimensionless Radius
re = External Radius
Let’s solve an example;
Given that the dimensionless radius is 10 and the external radius is 90.
Find the well radius?
Hence, this implies that;
rD = Dimensionless Radius = 10
re = External Radius = 90
So, rw = re / rD
rw = 90 / 10
rw = 9
Therefore, the well radius is 9.
How to Calculate Dimensionless Radius Using Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the dimensionless radius.
Hence, to get the answer and workings of the dimensionless radius using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.
You can get this app via any of these means:
Web – https://www.nickzom.org/calculator-plus
To get access to the professional version via web, you need to register and subscribe for NGN 1,500 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator
Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Petroleum under Engineering
Then, Click on Well Testing under Petroleum
So, Click on Dimensionless Radius under Well Testing
Also, the screenshot below displays the page or activity to enter your values, to get the answer for the dimensionless radius according to the respective parameters which are the external radius (re) and well radius (rw).
Then, enter the values appropriately and accordingly for the parameters as required by the external radius (re) is 18 and well radius (rw) is 16.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the dimensionless radius and presents the formula, workings and steps too.
Read more: How to Calculate and Solve for Critical Radius for Heterogeneous Nucleation | Phase Transformation
