Recent content by LT72884

I did mention 8n my original problem and question that i know its not infinite time, so i would have to pick 99% which is near enough. The depth of the block is not needed as well I didn't take measurements at the composite side. But if solving the thermal circuit, i 9nly need to splve for...

excellent, i am glad of that. I have not been to these forums for a few years since i have been doing well in school, then heat transfer happened hahaha. I will not mention the forbidden ai

oh dang. No they have not gone over this stuff. This is kind of an "extra" step im taking to learn more... maybe i bit of more than i could chew? My end goal was to make a simple excel sheet that would calculate the time and make a simple graph, but im thinking this is a bit more complicated...

i have no idea.... i just know what the plot looks like. I could divide it into 4 "areas" or points, but then its the same issue, how long does the thermal wave take to get to point 1,2,3,4 etc

It will look like the graph of a capacitor charge, slowly rising until steady state. So some where between 2 and 5 hours, the T2 temp hits 226 and stays flat the rest of the time until 12 hours is up. I would like to find the time it hits that flat line

Hello All. Hope all is well with the forums. I have conducted a heat transfer lab experiment and i have gotten stuck. Its not complicated, but i am stuck. I have figured out half of my answers but need help with the second half. I have a 1 inch thick by 6 inch tall piece of basic rubber (use...

On some yes

Thats what i thought. Though i have been informed differently a few times, and each time they do have a good explanation too. Im hoping the other user, i think its Russ, will chime in. I love learning and this is good stuff

Ok, so i have a high powered rocket i made and it hits about 420 m/s At low mach numbers, most the drag is due to skin friction, hence why you can solve for the Cd based on the Re and geometry alone (Dr. Gerald M. Gregoreks work shows this) However, as soon as you hit higher mach numbers...

google must round differently is all. There 32 was 90.. But really it shold be 89.6 oh well

ok, so if my launch day was 32C (90F) and the change in temp was 1 C, meaning the new temp was now 33C, that would mean the temp was 91.4 degrees F? Or is the change in temp only referring to the material itself since thats the Cp we are using? so whatever tmep the material was at the beginning...

i do know that it also uses pressure drag(Cdp) at higher machnumbers. but doesnt pressure drag end up being simplified down to Fd once you know the Cdp?

correct, i do know this equation. and i THOUGHT that is what i used.... or maybe i didnt haha. Yes, 1 degree increase of C is 1 unit increase of kelvin. So if my dT is only changing by 1 k, that means the temp change was 1 C as well, meaning the increase was from 32 C to 33C based upon the...

32 f is 273k It seems that for every 2 degrees f, k increases by 1. So 2:1 from F to k

Well, openfoam uses it for 210m\s and i know HISA uses for 420m\s when i run cfd What formula would you recommend for high mach numbers?