The image above represents heat flux. To calculate heat flux, three essential parameters are needed and these parameters are **Thermal Conductivity (K), Density (ρ) **and **Heat Capacity at Constant Pressure (c _{p}).**

**The formula for calculating heat flux:**

q = ^{K} / _{ρcp}

Where:

q = Heat Flux

K = Thermal Conductivity

ρ = Density

c_{p} = Heat Capacity at Constant Pressure

Let’s solve an example;

Find the heat flux when the thermal conductivity is 21, the density is 12 and the heat capacity at constant pressure is 24.

This implies that;’

K = Thermal Conductivity = 21

ρ = Density = 12

c_{p} = Heat Capacity at Constant Pressure = 24

q = ^{K} / _{ρcp}

So, q = ^{21} / _{(12)(24)}

q = ^{21} / _{288}

q = 0.0729

Therefore, the **heat flux **is **0.0729 W.**

**Calculating the Thermal Conductivity when the Heat Flux, the Density and the Heat Capacity at Constant Pressure are Given**

K = q (ρ c_{p})

Where:

K = Thermal Conductivity

q = Heat Flux

ρ = Density

c_{p} = Heat Capacity at Constant Pressure

Let’s solve an example;

Find the thermal conductivity when the heat flux is 15, the density is 10 and the heat capacity at constant pressure is 14.

This implies that;

q = Heat Flux = 15

ρ = Density = 10

c_{p} = Heat Capacity at Constant Pressure = 14

K = q (ρ c_{p})

K = 15 (10 x 14)

That is, K = 15 (140)

K = 2100

Therefore, the **thermal conductivity** is **2100.**

Read more: How to Calculate and Solve for Heat Flux | Thermal Properties

**Calculating the Density when the Heat Flux, the Thermal Conductivity and the Heat Capacity at Constant Pressure are Given**

ρ = ^{K} / _{q x cp}

Where:

ρ = Density

q = Heat Flux

K = Thermal Conductivity

c_{p} = Heat Capacity at Constant Pressure

Let’s solve an example;

Find the density when the heat flux is 18, the thermal conductivity is 12 and the heat capacity at constant pressure is 4.

This implies that;

q = Heat Flux = 18

K = Thermal Conductivity = 12

c_{p} = Heat Capacity at Constant Pressure = 4

ρ = ^{K} / _{q x cp}

Then, ρ = ^{12} / _{18 x 4}

ρ = ^{12} / _{72}

ρ = 0.167

Therefore, the **density **is **0.167.**

**Calculating the Heat Capacity at Constant Pressure when the Heat Flux, the Thermal Conductivity and the Density are Given**

c_{p} = ^{K} / _{q x ρ}

Where:

c_{p} = Heat Capacity at Constant Pressure

q = Heat Flux

K = Thermal Conductivity

ρ = Density

Let’s solve an example;

Find the heat capacity at constant pressure when the heat flux is 10, the thermal conductivity is 20 and the density is 6.

This implies that;

q = Heat Flux = 10

K = Thermal Conductivity = 20

ρ = Density = 6

c_{p} = ^{K} / _{q x ρ}

So, c_{p} = ^{20} / _{10 x 6}

c_{p} = ^{20} / _{60}

c_{p} = 0.33

Therefore, the **heat capacity at constant pressure **is **0.33.**

Read more: How to Calculate and Solve for Energy Flux | Energy Transport

**How to Calculate the Heat Flux in Solidification of Metals Using Nickzom Calculator**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the heat flux.

To get the answer and workings of the heat flux 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 **Heat Flux **under **Solidification of Metal
**

The screenshot below displays the page or activity to enter your values, to get the answer for the heat flux according to the respective parameter which is the **Thermal Conductivity (K), Density (ρ) **and **Heat Capacity at Constant Pressure (c _{p}).**

Now, enter the values appropriately and accordingly for the parameters as required by the **Thermal Conductivity (K)** is **21**,** Density (ρ)** is **12 **and **Heat Capacity at Constant Pressure (c _{p})** is

**24**.

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the heat flux and presents the formula, workings and steps too.