- C p = 34,700 J/ (350 g x 151ºC)
- C p = 34,700 J/ (52850 g x ºC)
- C p = 0.65657521286 J/ (g x ºC)
Full Answer
How to calculate heat flux?
How to Calculate Heat flux? Heat flux calculator uses heat_flux = Thermal Conductivity* (Temperature/Length) to calculate the Heat flux, Heat flux or thermal flux, sometimes also referred to as heat flux density, heat-flow density or heat flow rate intensity is a flow of energy per unit of area per unit of time.
How much mw/mm² do I need to vape?
Generally you want to stay somewhere between 120 and 350 mW/mm². Some like a cooler vape, others like it hot. The color of the flame icon will give you a rough idea. Adjust to your own taste. The higher the heat capacity, the slower your coil will be to heat up (and to cool down).
Is heat flux vector or scalar quantity?
Heat flux also named as thermal flux, is referred to as heat flux density, heat-flow density is a flow of energy per unit of area per unit of time. In SI its units are watts per square meter. As heat flux has both a direction and a magnitude, and so it is a vector quantity.
What is the relationship between heat flux and temperature gradient?
Heat flux by the convection process is directly proportional to the temperature difference between solid, liquid, or gaseous media participating in heat transfer. Under the conduction process, the heat flux vector is directly proportional to and usually parallel to the temperature gradient vector.
How to calculate heat flux?
Heat flux or thermal flux, sometimes also referred to as heat flux density, heat-flow density or heat flow rate intensity is a flow of energy per unit of area per unit of time is calculated using heat_flux = Thermal Conductivity * ( Temperature / Length). To calculate Heat flux, you need Thermal Conductivity (k), Temperature (T) and Length (L). With our tool, you need to enter the respective value for Thermal Conductivity, Temperature and Length and hit the calculate button. You can also select the units (if any) for Input (s) and the Output as well.
What is heat flux?
Heat flux or thermal flux, sometimes also referred to as heat flux density, heat-flow density or heat flow rate intensity is a flow of energy per unit of area per unit of time. In SI its units are watts per square metre (W/m2). It has both a direction and a magnitude, and so it is a vector quantity.
What is thermal conductivity?
Thermal Conductivity - Thermal Conductivity is the rate at which heat passes through a specified material, expressed as the amount of heat that flows per unit time through a unit area with a temperature gradient of one degree per unit distance. (Measured in Watt per Meter per K)
What is the degree of heat present in a substance or object?
Temperature - Temperature is the degree or intensity of heat present in a substance or object. (Measured in Kelvin)
kingdal Super Member Verified Member ECF Veteran
Ever since I started building coils, I've always built to certain resistances. Wire gauge was something I used to control the number of wraps and the size of the coil. The other day I saw on the Steam engine calculator that different gauges and resistances affect something called heat flux.
readeuler Ultra Member Verified Member ECF Veteran
My understanding is that it's a measure of how concentrated the heat is - it tells you how much heat will radiated from a small 'unit' of coil surface area. Take-away: It's really just a ratio of wattage to coil surface area.
nasca Super Member Verified Member ECF Veteran
I dont understand it, either. But if I aim for somewhere between 200 and 260, I'm good.
kingdal Super Member Verified Member ECF Veteran
Heat flux is in reference to the "balancing act" between wire gauge/length, physical wrap count/coil ID that will actually fit in the atomizer and coil temperature per wattage applied... in this instance, radiant heat is expressed in milliwatts divided by square millimeters of surface area, or mW/mm².
vapemac Veteran
Maybe ask this guy? I heard he knows his stuff when it comes to flux capacitors
jjde Postman
Now, my usually MTL setup is 1.2 ohms, 2.5mm rod, 6 wraps on 28g Kanthal build. Vape that at 12w, 178 mW/mm2 & it's a cool vape, about what I like
jjde Postman
Second part I'm not so clear So is it as simple as more wattage = more heat, even with the same Heat Flux on both tanks?
dopamine1 Senior Member Verified Member ECF Veteran
I was messing around with a coil calculator and I noticed they added something new to it. Heat flux and heat capacity. Do you want them higher or lower or what? Also I put the wattage of the coil in the heat flux section when it was originally set at 10 watts, should you adjust that or leave it?
TheKiwi Vaping Master Verified Member ECF Veteran
The heat flux refers to how much heat energy (in this case, power/watts is used to represent heat) is given off from a unit area (mm^2) of the coil's surface.
dopamine1 Senior Member Verified Member ECF Veteran
Ok I think I understand, the heat capacity is how much energy a wire can 'hold' before it begins to heat up, or the energy that will push it to that point. And the heat flux is just a measure of the heat per square milimeter...
What does heat flux tell you?
When you set a heat flux, the calculator will tell you what power/voltage your mod needs to output in order to achieve the desired heat flux. What heat flux to aim for depends on how long your puffs are, whether or not you preheat your coil, the heat capacity of the coil, type of e-liquid, airflow, wicking, personal taste, etc.
What is coil calculator?
This coil calculator is a pretty simple and straightforward digital model of the geometry and electrical properties of an atomizer coil, and can be expected to be concistent with at least itself . Real life, on the other hand, involves a myriad of ways to introduce error to your numbers:
Why is density used in coil material?
The density of the coil material is used to calculate the wire mass and heat capacity . Because of lacking data on the density of different Nichrome alloys (except N80), the density of the Nichrome qualities are interpolated from the densities of the main alloy elements.
What is the number of wraps in an atomizer?
Number of wraps. If you're making a coil for an atomizer where both the coil legs point in the same direction, the "Number of wraps rounded to half wraps" is the result you want. If you're coiling for an atomizer where the legs point in the opposite direction, use the "Number of wraps rounded to full wraps" result.
How to find wire diameter on a spool?
Enter this in the AWG field or the field to the immidiate right of this, labeled ⌀ r .
How to find resistance wire length?
The resistance wire length is your set target resistance divided by the wire resistance per unit length. Leg length is subtracted before calculating the number of wraps.
How to find the circumference of a coil?
The circumference of your coil is then by multiplying the outer diameter with π, and we have length of a single wrap.
