Izzy410 wrote:You changed the head wind speed which affects it. there's a terminal velocity where peak performance is achieved.
anyhow the proper speed is 18 m/s. to insert turbulence wind. err i get back to you. i have to do some stuff. when im free in like 5 hours i'll post how to. tyre rotation is a bit simple. double click the tyres and then click atribute. and you have to calculate by the size of your tyre, the degrees of rotation per second. and make sure its CLOCKWISE !
iterations are trys that the software takes to sole you model. It works from two sides trying to reach convergence or get really close. Think of it as trying to guess a number playing the higer lower gamepudin wrote:I run another test today with 19 m/s wind and 500 literation
Forces
X = -2.144454E+00 m
Y = 2.498600E-01 m
Z = 1.943947E-02 m
Velocity
Cdx = 2.119967E-01
Cdy = 9.393115E-03
Cdz = 2.835454E-03
The drag became less than before.
Can someone explain this?
flynfrog wrote:iterations are trys that the software takes to sole you model. It works from two sides trying to reach convergence or get really close. Think of it as trying to guess a number playing the higer lower gamepudin wrote:I run another test today with 19 m/s wind and 500 literation
Forces
X = -2.144454E+00 m
Y = 2.498600E-01 m
Z = 1.943947E-02 m
Velocity
Cdx = 2.119967E-01
Cdy = 9.393115E-03
Cdz = 2.835454E-03
The drag became less than before.
Can someone explain this?
Is there an option to select mesh size?
flynfrog wrote:when they CFD program works it cuts your model up into tiny chunks to calculate the fluid flow on that part of the surface. The tighter the mesh the smaller the chunks to finer the resolution.
correctpudin wrote:flynfrog wrote:when they CFD program works it cuts your model up into tiny chunks to calculate the fluid flow on that part of the surface. The tighter the mesh the smaller the chunks to finer the resolution.
It means,more time needed to finish and more accurate reading is it?
flynfrog wrote:I cant say if its better or worse. Race cars are a compromise. You now have a way to quantify the added drag (hint use your cfd) You can also tell how much weight was saved. So you can tell the energy needed to move that much mass to the end of the track and you know how much drag you can save other wise. This is where it starts to get fun
Too heavy,around 30 grams without the tyres and aerofoilsflynfrog wrote:Over all the basic shape looks pretty good. Are you to heavy or to light?
I would still do a sharper rear tail so you are not ending in a radius.