The image above represents freezing time. To calculate the freezing time, three essential parameters are needed, and these parameters are the Thickness of Solidified Metal (M), Constant (β) and Heat Diffusivity (α).
The formula for calculating freezing time:
t = M² / 4β²α
Where:
t = Freezing Time
M = Thickness of Solidified Metal
β = Constant
α = Heat Diffusivity
Let’s solve an example;
Find the freezing time when the thickness of solidified metal is 8, the constant is 10 and the heat diffusivity is 2.
This implies that;
M = Thickness of Solidified Metal = 8
β = Constant = 10
α = Heat Diffusivity = 2
t = M² / 4β²α
t = 8² / 4(10)²(2)
So, t = 64 / 4(100)(2)
t = 64 / 800
t = 0.08
Therefore, the freezing time is 0.08 s.
Calculating the Thickness of Solidified Metal when the Freezing Time, the Constant and the Heat Diffusivity are Given
M = t x 4β²α
Where:
M = Thickness of Solidified Metal
t = Freezing Time
β = Constant
α = Heat Diffusivity
Let’s solve an example;
Find the thickness of solidified metal when the freezing time is 21, the constant is 9 and the heat diffusivity is 2.
This implies that;
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t = Freezing Time = 21
β = Constant = 9
α = Heat Diffusivity = 2
M = t x 4β²α
That is, M = 21 x 4(9²)(2)
M = 21 x 4(81)(2)
M = 21 x 4(162)
So, M = 21 x 648
M = 13668
Therefore, the thickness of solidified metal is 13668.
Read more:Â How to Calculate and Solve for Solidification Time | Solidification of Metals
Calculating the Constant when the Freezing Time, the Thickness of Solidified Metal and the Heat Diffusivity are Given
β = √(M / t x 4α)
Where:
β = Constant
t = Freezing Time
M = Thickness of Solidified Metal
α = Heat Diffusivity
Let’s solve an example;
Find the constant when the freezing time is 4, the thickness of solidified metal is 40 and the heat diffusivity is 2.
This implies that;
t = Freezing Time = 4
M = Thickness of Solidified Metal = 40
α = Heat Diffusivity = 2
β = √(40 / 4 x 4(2))
β = √(40 / 4 x 8)
So, β = √(40 / 32)
β = √(1.25)
β = 1.11
Therefore, the constant is 1.11.
Read more:Â How to Calculate and Solve for Heat Flux | Solidification of Metals
Calculating the Heat Diffusivity when the Freezing Time, the Thickness of Solidified Metal and the Constant are Given
α = M / t x 4β²
Where:
α = Heat Diffusivity
t = Freezing Time
M = Thickness of Solidified Metal
β = Constant
Let’s solve an example;
Given that the freezing time is 2, the thickness of solidified metal is 30 and the constant is 1. Find the heat diffusivity?
This implies that;
t = Freezing Time = 2
M = Thickness of Solidified Metal = 30
β = Constant = 1
α = M / t x 4β²
That is, α = 30 / 2 x 4(1²)
α = 30 / 8
α = 3.75
Therefore, the heat diffusivity is 3.75.
How to Calculate Freezing Time With Nickzom Calculator
Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the freezing time.
To get the answer and workings of the freezing time 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 2,000 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 Materials and Metallurgical under Engineering.
Now, Click on Solidification of Metal under Materials and Metallurgical
Now, Click on Freezing Time under Solidification of Metal
The screenshot below displays the page or activity to enter your values, to get the answer for the freezing time according to the respective parameter which is the Thickness of Solidified Metal (M), Constant (β) and Heat Diffusivity (α).
Now, enter the values appropriately and accordingly for the parameters as required by the Thickness of Solidified Metal (M) is 8, Constant (β) is 10 and Heat Diffusivity (α) is 2.
Finally, Click on Calculate
As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the freezing time and presents the formula, workings and steps too.
