English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Liquid slip flow with a Knudsen number Kn = 0.001-0.1 plays a dominant rolein confined flow channels. Its physical origin can be attributed to theintermolecular fluid-solid (F-S) interaction force. To this end, we proposeherein continuous force functions (decaying either exponentially or by a powerlaw) between fluid particles and two confined flat walls in the framework ofthe mesoscopic lattice Boltzmann model (LBM). The analytical solutions fordensity profile, velocity profile, slip length, and permeability ratio arederived and related to the mesoscale F-S interaction parameters and the size ofthe gap of the flow channel. Through nondimensionalization of the analyticalsolutions, we obtain the dimensionless numbers that indicate the key feature ofslip-flow systems for each of the proposed force functions. The analyticalsolutions are strictly consistent with the LBM solutions. We suggest reasonableranges for the F-S interaction parameters based on the observed range ofdensity ratio (film fluid to bulk fluid) and the increasing permeability ratioswith narrowing gap size. Within the given range of interaction parameters,simple relationships between permeability ratios and dimensionless numbers areprovided by fitting. The curves for continuous F-S interaction force with twofree parameters are calibrated for a hydrophobic surface by using LBMsimulations, which were validated a priori by comparison with the slip velocityprofile measured in a benchmark flow experiment. The mesoscopic LBM model basedon the proposed F-S interaction force functions provides a robust framework toelucidate the physical process of liquid slip flow.

Mesoscale investigations of fluid-solid interaction: Liquid slip flow in a parallel-plate microchannel