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

Accurate simulations of sound propagation in narrow geometries need toaccount for viscous and thermal losses. In this respect, effective boundaryconditions that model viscothermal losses in frequency-domain acoustics haverecently gained in popularity. Here, we investigate the time-domain analogue ofone such boundary condition. We demonstrate that the thermal part of theboundary condition is dissipative in time domain as expected, while the viscouspart, unexpectedly, may lead to an infinite instability. Afinite-difference-time-domain scheme is developed for simulations of soundpropagation in a duct with only thermal losses, and the obtained transmissioncharacteristics are found to be in excellent agreement with frequency-domainsimulations.

Investigations of an effective time-domain boundary condition for quiscent viscothermal acoustics