Van't Hoff Laboratory for Physical and Colloid Chemistry, Utrecht University, Debye Institute for Nanomaterials Science, Padualaan 8, 3584 CH Utrecht, The Netherlands.
J Phys Condens Matter. 2010 Aug 18;22(32):325104. doi: 10.1088/0953-8984/22/32/325104. Epub 2010 Jul 16.
An asymptotic formula is reported for the second virial coefficient B(2) of a dipolar hard-sphere (DHS) fluid, in zero external field, for strongly coupled dipolar interactions. This simple formula, together with the one for the weak-coupling B(2), provides an accurate prediction of the second virial coefficient for a wide range of dipole moments, including those that are experimentally accessible in magnetite ferrofluids. The weak-coupling B(2) also yields an estimate of the magnetic moment minimally needed for isotropic gas-liquid phase-separation, if any, in the DHS fluid.
报道了零外场下强耦合偶极相互作用的偶极硬球（DHS）流体的第二维里系数 B(2)的渐近公式。这个简单的公式与弱耦合 B(2)一起，为广泛的偶极矩范围内的第二维里系数提供了准确的预测，包括在磁铁矿铁磁流体中实验上可达到的偶极矩。弱耦合 B(2)还估计了 DHS 流体中是否存在各向同性气-液分相所需的最小磁矩。
