Hi Muhammad, It's 'just' a fit/proportionality parameter relating the viscosity for a k-vector to the length of the vector and the viscosity proper (eta0). From the equation you can work out that the unit is nm^-2.
Hope it helps, Tsjerk On Thu, Mar 24, 2011 at 10:27 AM, Alif M Latif <[email protected]> wrote: > Dear gromacs users and developers, > > I have 1 question about the calculation of viscosity using g_tcaf. I got > the visc_k.xvg file. According to Berk Hess's report, the k values should be > extrapolated to k=0 to obtain the viscosity. The question is (and I'm sorry > if this is a silly question), what is "a" in : eta(k) = eta 0 (1-ak^2) > ?..can someone help? I couldn't find (or missed) it in the paper. > > Thank You in advance, > > MUHAMMAD ALIF MOHAMMAD LATIF > Laboratory of Theoretical and Computational Chemistry > Department of Chemistry > Faculty of Science > Universiti Putra Malaysia > 43400 UPM Serdang, Selangor > MALAYSIA > > > > -- > gmx-users mailing list [email protected] > http://lists.gromacs.org/mailman/listinfo/gmx-users > Please search the archive at > http://www.gromacs.org/Support/Mailing_Lists/Search before posting! > Please don't post (un)subscribe requests to the list. Use the > www interface or send it to [email protected]. > Can't post? Read http://www.gromacs.org/Support/Mailing_Lists > -- Tsjerk A. Wassenaar, Ph.D. post-doctoral researcher Molecular Dynamics Group * Groningen Institute for Biomolecular Research and Biotechnology * Zernike Institute for Advanced Materials University of Groningen The Netherlands
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