10 فروردین 1403
كوروش قيصري

کوروش قیصری

مرتبه علمی: دانشیار
نشانی: دانشکده علوم و فناوری نانو و زیستی - گروه فیزیک
تحصیلات: دکترای تخصصی / فیزیک هسته ای-راکتور
تلفن: 07731222242
دانشکده: دانشکده علوم و فناوری نانو و زیستی

مشخصات پژوهش

عنوان
Calculation of bulk elastic constants of Gay-Berne nematic liquid crystals from new direct correlation and pair distribution functions
نوع پژوهش مقالات در همایش ها
کلیدواژه‌ها
Direct correlation function, elastic constants, Gay-Berne, nematic liquid crystals, prolate molecule
پژوهشگران ابوالقاسم عوض پور (نفر اول) ، حسین عسکری (نفر دوم) ، کوروش قیصری (نفر سوم) ، فروغ لطفی (نفر چهارم)

چکیده

In our earlier work [Phys. Rev. E, 82, 041701 (2010)], the bulk elastic constants were calculated using Poniewierski-Stecki expressions and the new direct correlation function. We calculated the bulk elastic constants,K11,K22 and K33 of Gay-Berne nematic liquid crystals at constant temperature and density using the expressions proposed by Stelzer and co-workers [J. Chem. Phys. 103, 3098 (1995)]. The angular coefficients of the direct correlation function, which enter the final equations, have been determined using the new direct correlation and pair distribution functions. By study of the model at a fixed temperature over a wide range of densities for molecular elongation, k = 3, the detailed information is provided on the elastic behavior of the Gay-Berne nematic. The results of our calculations are qualitatively in agreement with the molecular dynamic simulation results.