% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Dapp:189218, author = {Dapp, Wolfgang and Müser, Martin}, title = {{C}ontact mechanics of and {R}eynolds flow through saddle points: {O}n the coalescence of contact patches and the leakage rate through near-critical constrictions}, journal = {epl}, volume = {109}, number = {4}, issn = {0295-5075}, address = {Les Ulis}, publisher = {EDP Sciences}, reportid = {FZJ-2015-02409}, pages = {44001}, year = {2015}, abstract = {We study numerically local models for the mechanical contact between two solids with rough surfaces. When the solids softly touch either through adhesion or by a small normal load L, contact only forms at isolated patches and fluids can pass through the interface. When the load surpasses a threshold value, $L_{\text{c}}$ , adjacent patches coalesce at a critical constriction, i.e., near points where the interfacial separation between the undeformed surfaces forms a saddle point. This process is continuous without adhesion and the interfacial separation near percolation is fully defined by scaling factors and the sign of $L_{\text{c}}-L$ . The scaling leads to a Reynolds flow resistance which diverges as $(L_{\text{c}}-L)^{-\beta}$ with $\beta = 3.45$ . Contact merging and destruction near saddle points become discontinuous when either short-range adhesion or specific short-range repulsion are added to the hard-wall repulsion. These results imply that coalescence and break-up of contact patches can contribute to Coulomb friction and contact aging.}, cin = {JSC}, ddc = {530}, cid = {I:(DE-Juel1)JSC-20090406}, pnm = {511 - Computational Science and Mathematical Methods (POF3-511)}, pid = {G:(DE-HGF)POF3-511}, typ = {PUB:(DE-HGF)16}, UT = {WOS:000351955600018}, doi = {10.1209/0295-5075/109/44001}, url = {https://juser.fz-juelich.de/record/189218}, }