Recent content by engineerings

I don't really see how to tackle the problem from now on..

ok I'll try

Because the interaction forces between gas molecules are less strong than in a liquid. But I don't really see why, image two silica particles immersed in a liquid or in a gas.. I actually think they are larger is a gas than in a liquid. In the van der waals contributions there is the...

Are van der waals forces between two molecules stronger in air of in water (as a medium)?

I don't really have a specific example, the question was asked me in this way 'does the thermal boundary layer develops faster for a viscous fluid than for an inviscid fluid'? I could make an example: imagine you have a hot flat plate at 40°C and there flows a liquid over it, initially at a...

thanks, but this has to do with the hydrodynamic boundary layer, but why does the thermal boundary layer also develops faster for a viscous fluid?

Can anyone explain me why the thermal boundary layer develops faster for viscous fluids? I would just say it would develop more slowly because due to high viscosities there are low reynoldsnumbers and thus less turbulence or mixing. This causes a slow homogenization of temperature (assume a...