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

With a noticeable increase in research centered on modeling micro fluidinterfaces in the framework of mesoscopic methods, we conduct an exhaustivestudy of discrete unified gas-kinetics scheme (DUGKS) in handling complicatedinterface deformations. High-order isotropic finite-difference schemes arefirst utilized in DUGKS to improve its capability in tracking interfaces. Theperformance of third-stage third-order DUGKS where source term is incorporatedhas also been assessed for the first time and a series of numerical tests havebeen conducted to investigate their capability. The comparative analysis haverevealed the reason why the performance of lattice Boltzmann method is superiorto that of discrete velocity method and DUGKS in general condition from aninformed perspective. The mechanism behind the performance distinction betweenthe central scheme and upwind scheme utilized in meso-flux construction inDUGKS have also been clarified. Numerical results have shown that theemployment of high-order schemes in DUGKS does have an effect on the reductionof numerical dissipation, but the overall accuracy of this method is limited bythe precision of prediction of source terms on mesh interface. The capabilityof third-stage third-order DUGKS is severely inhibited by its intrinsiclimitation of the ratio of time step to particle collision time. Among thevarious kinds of DUGKS employed with different reconstruction methods, the mostpromising scheme is the one with third-order isotropic reconstruction andupwind-based meso-flux evaluation, which is able to ensure an unique balancebetween efficiency and accuracy.

Performance evaluation of high-order reconstruction for discrete unified gas-kinetics scheme in tracking fluid interfaces