hi, great tutorial, but I can be sure what convection values are correct for various materials?....you entered 1000, do you have any official tables where these values are included?
Good question. The value that you type in depends on the thing doing the conducting. In this case it is air. So you would google the conduction value of air which I did. A few accepted values show up in the literature available. still air is 1-5 Btu / ( h×ft 2 ×R ). This is the default metric input in fusion. so you would just type in any number from 1-5. But air usually moves and if the air moves faster (within reason, extremally fast air will cause friction and more heat than it absorbs), will remove more heat. 5-200 in most forced cooling applications. Then you have liquid fluids. Water and oil absorb more heat and have values from 20-3000. If you don't know the fluid or other conduction thing, velocity of the fluid, or the fluids starting temperature. Then you have no choice left but to set up a bench test. Get the fluid you need or other thing, set up the conditions in a small scale way. A heat lamp (for example) and thermometers and apply the fluids in a real and representative way and measure the rate of temperature change and the overall mass of the fluid. This will get you the btu rate you need for the simulation with a bit of math that you will need to look up. ASTM testing standards usually has all this stuff very well documented so if you see a number in the simulation and don't know where it comes from google ASTM testing standards for (enter what ever it is you need to know here). Disclaimer!!! I googled this stuff myself and did not verified the accuracy of the information. At the end of the day bench testing trumps google every time. If you can afford to do a bench test to collect the data needed for the simulation please just do that. The internet has far more misinformation than correct information. Never forget that.
holy shit now just magnetic field, fluid, optical and electrical conductivity study needs to be implemented and its the ultimate tool, replacing lots of specialized applications that require expensive week long courses and lots of learning each.
@@adskFusion To make wire because actually it's "almost" impossible. One of the best way to make a tool like this is to click on a face object, choose a parametric face ( round / custom / librairie ) and clic on another face of an object to attach it. Then you can clic on the wire to make some nice round edges with some basic param ( max lenght, angle ) and voila ! Lets resume : Clic on a face, put down a param / lib shape, clic on other face, generate wire then clic to add angle with a bezier thing. By the way, i think you need to go deep for 3d printing, like custom gcode, make this round shape 60mmsec ( or % speed ), letters on this other shape 10mm, with multiple layer height. Like your tool cam, kind of !
That sort of thing would be addressed in a CFD thermal simulation. In that case, the heating of the air around the product would cause it to rise (related to the direction of gravity), and cooler ambient air would move in to take its place. As far as I know. this cannot be accounted for in the FEA approach to thermal problems. The good news? We hope to get CFD simulation in Fusion 360 at some point. If you have immediate needs, see: www.autodesk.com/products/cfd/overview
I believe that you can find this in the gallery. There is also a section in the samples for the Adoption content, but make sure to see the link in the description. That's where this tutorial is borrowed from.
hi, great tutorial, but I can be sure what convection values are correct for various materials?....you entered 1000, do you have any official tables where these values are included?
Good question. The value that you type in depends on the thing doing the conducting. In this case it is air. So you would google the conduction value of air which I did. A few accepted values show up in the literature available. still air is 1-5 Btu / ( h×ft 2 ×R ). This is the default metric input in fusion. so you would just type in any number from 1-5. But air usually moves and if the air moves faster (within reason, extremally fast air will cause friction and more heat than it absorbs), will remove more heat. 5-200 in most forced cooling applications. Then you have liquid fluids. Water and oil absorb more heat and have values from 20-3000. If you don't know the fluid or other conduction thing, velocity of the fluid, or the fluids starting temperature. Then you have no choice left but to set up a bench test. Get the fluid you need or other thing, set up the conditions in a small scale way. A heat lamp (for example) and thermometers and apply the fluids in a real and representative way and measure the rate of temperature change and the overall mass of the fluid. This will get you the btu rate you need for the simulation with a bit of math that you will need to look up. ASTM testing standards usually has all this stuff very well documented so if you see a number in the simulation and don't know where it comes from google ASTM testing standards for (enter what ever it is you need to know here). Disclaimer!!! I googled this stuff myself and did not verified the accuracy of the information. At the end of the day bench testing trumps google every time. If you can afford to do a bench test to collect the data needed for the simulation please just do that. The internet has far more misinformation than correct information. Never forget that.
Where can I learn more about this?
I love you fusion 360 and AutoDesk
holy shit
now just magnetic field, fluid, optical and electrical conductivity study needs to be implemented and its the ultimate tool, replacing lots of specialized applications that require expensive week long courses and lots of learning each.
We'd love to get all of that in Fusion 360!
However, right now CFD is the only one really on our radar.
Can you make a tool for wires ?
To make wires, or simulate? We definitely need improvements to our 3d Sketcher to make them easier...
@@adskFusion To make wire because actually it's "almost" impossible. One of the best way to make a tool like this is to click on a face object, choose a parametric face ( round / custom / librairie ) and clic on another face of an object to attach it. Then you can clic on the wire to make some nice round edges with some basic param ( max lenght, angle ) and voila ! Lets resume : Clic on a face, put down a param / lib shape, clic on other face, generate wire then clic to add angle with a bezier thing.
By the way, i think you need to go deep for 3d printing, like custom gcode, make this round shape 60mmsec ( or % speed ), letters on this other shape 10mm, with multiple layer height. Like your tool cam, kind of !
So how do I add the orientation of the bulb as thermal patterns would vary depending on whether the bulb is upside down or hanging from a ceiling.
That sort of thing would be addressed in a CFD thermal simulation. In that case, the heating of the air around the product would cause it to rise (related to the direction of gravity), and cooler ambient air would move in to take its place. As far as I know. this cannot be accounted for in the FEA approach to thermal problems. The good news? We hope to get CFD simulation in Fusion 360 at some point. If you have immediate needs, see: www.autodesk.com/products/cfd/overview
From which library did you download the LED Bulb model? I cannot find it in Simulation Samples folder?
I believe that you can find this in the gallery. There is also a section in the samples for the Adoption content, but make sure to see the link in the description. That's where this tutorial is borrowed from.
brilliant
You are useful in work
Thanks useful