Now, MIT mathematicians have derived aformulafor determining the maximum amount of heat exchanged between two objects separated by distances shorter than the width of a single hair. For any two objects situated mere nanometers apart, the formula can be used to calculate the most heat one body m...
Conduction is probably the best understood of the three and is simply the transfer of heat through molecular contact, which is just a geeky way of saying two things of different temperatures that are touching and heat transfers from hot to cold. For example, If you pick up a hot pan, the...
It is highly dependent on the distance between the bodies and significant only when that distance is very small (say <100 nm). Its origin is electromagnetic. The general expression for the van der Waals force between two spheres of equal size has the following form: (2.39)FvdW=Cdx2 where...
Two broad classes of viscous flow will be illustrated in this chapter: 1. Poiseuille flow, in which an applied pressure difference causes fluid motion between stationary surfaces. 2. Couette flow, in which a moving surface drags adjacent fluid along with it and thereby imparts a motion to the...
The air molecules just hang around in the vicinity of the stagnation line, like the proverbial donkey midway between two bales of hay, unable to decide which alternative to choose. Air near the wing is delayed relative to an undisturbed parcel of air. The obstacle effect is about the same ...
I need to optimize the trajectory of a space shuttle I work for a power generation company doing load flow analysis I model how a robot arm needs to move Some of these applications are mathematically simple (but are based on scientific principles, such as the conservation of heat, mass and...
“I’ve never liked housework. I get by doing little chores when I feel like them in between painting. Who wants to chase dust all their life?” I’d heard about her studio (actually it was a few rooms of her house and her whole house acted as her studio) being recreated up at ...
least one fin of the heat sink structure, wherein an annular airflow can be established between the at least one airflow tube and the at least one fin of the heat sink structure, thereby enhancing heat transfer from the heat sink structure to air and cooling of the heat generating ...
A degassing module for removal of air and other gases during operation of a medical therapy device that delivers any one of hemodialysis, hemodiafiltration and hemofiltration. The degassing module has a flow-through first chamber that has a hydrophobic vent membrane that has an exterior and interior...
rotational motion to effect fluid communication between two conduits. FIG. 1A illustrates the device in exploded view. FIGS. 1B and 1C illustrate in cross-sectional view (along dotted line A of FIG. 1A) the switching structure of the microdevice in closed and open configurations, respectively....