By Peter Dyson, Rajesh Ransing, Paul H Williams, Rhondri Williams
ISBN-10: 0470697377
ISBN-13: 9780470697375
ISBN-10: 047075124X
ISBN-13: 9780470751244
Today’s medical and engineering neighborhood has an excellent snatch on tips on how to version fluid flows at macro and molecular scales, with well-developed concept and helping applied sciences. among those extremes lies the nano/meso scale (i.e. within the variety of 50nm-500nm) the place fluid movement types stay tricky. Continuum types used at macro scales suppose a negligible impact from molecular interactions, whereas molecular versions don't are expecting circulation good at nano/meso dimensions. the answer, and the topic of this publication, is to exploit components from either to trap thoroughly the right kind physics (from the molecular scale) and supply an outline when it comes to helpful fluid houses (as characterised at the continuum scale).
Fluid houses at Nano/Meso Scale is predicated at the authors’ previous 5 years’ study that has yielded new thoughts in fluid simulation innovations on the nano/meso scale. The authors procedure this topic in a simple and simple to appreciate layout, delivering a primary step into the topic for researchers in any respect degrees. They current new instruments that permit the numerical computation of fluid homes from first rules, allowing the reader to start to version effectively fluids at nano/meso scale. it truly is was hoping that those first steps will engender the additional improvement and development of simulation suggestions at this scale, and preserve engineering simulation on the leading edge of expertise.
- Presents across the world major advancements within the box of fluid houses at nano/meso scale
- Provides the reader with the 1st steps to fluid modelling at nano/meso-scales in addition to state of the art purposes
- Includes cutting edge and new simulation strategies besides a close exam of present numerical equipment
Read or Download Fluid Properties at Nano/Meso Scale: A Numerical Treatment (Microsystem and Nanotechnology Series? ?(ME20)) PDF
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Additional resources for Fluid Properties at Nano/Meso Scale: A Numerical Treatment (Microsystem and Nanotechnology Series? ?(ME20))
Example text
The electron density in a molecule’s electron cloud varies due to the finite number of electrons orbiting the atom, but the variation of density in the cloud created hotspots of high charge, creating a temporary multipole that attracts hotspots of opposite charge on other molecules. A molecule with a temporary multipole can also attract/repel electrons from neighbouring molecules, thereby propagating the multipole effect. These short-term multipoles produce the net affect of a weak attractive force between neutral molecules such as nitrogen, methane and many others.
It can be seen that, there must be a limiting value of θ that, if exceeded, ensure no collisions occur and the spheres pass each other [4]. 16 Hard sphere collision detection. P1: PIC c01 JWBK251-Ransing 34 June 20, 2008 10:40 Printer Name: Yet to Come THE NATURE OF FLUID FLOW This collision test is evaluated for every possible colliding pair within the system by looping over all molecules and calculating the next collision time for each. From these times, a table of collision times is created containing predictions for when each sphere will have its next collision.
P1: PIC c01 JWBK251-Ransing June 20, 2008 10:40 Printer Name: Yet to Come TYPES OF SIMULATION 25 Additional information on the Monte Carlo simulation method and its different ensembles can be found in the book by Gould et al. [17]. Gould provides examples of Monte Carlo methods, focusing on its advantages at simulating phase changes, which has been used to good effect by Levesque et al. [18] applied to hydrogen storage in carbon nanotubes. 2 Molecular Dynamics Molecular dynamic (MD) simulations model fluid in two ways, with molecules being represented as hard or soft spheres.
Fluid Properties at Nano/Meso Scale: A Numerical Treatment (Microsystem and Nanotechnology Series? ?(ME20)) by Peter Dyson, Rajesh Ransing, Paul H Williams, Rhondri Williams
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