We present a non-isothermal mesoscopic model for investigation of the phase transition dynamics of thermoresponsive polymers. Since this model conserves energy in the simulations, it is able to correctly capture not only the transient behavior of polymer precipitation from solvent, but also the energy variation associated with the phase transition process. Simulations provide dynamic details of...

An anisotropic nonlinear elastic model is advanced for crystals belonging to either of two polytypes of boron carbide ceramic. Crystals undergo transformation to an isotropic, amorphous phase upon attainment of a local state-based criterion associated with a loss of intrinsic stability. The model is implemented using the dynamic finite element method, and is demonstrated on a representative vol...

Mesoscale models are used to study dynamic deformation and failure in silicon carbide (SiC) and aluminum oxynitride (AlON) polycrystals. Elastic and anisotropic elastic-plastic crystal models represent mechanical behavior of SiC and AlON and grains, respectively. Cohesive zone models represent intergranular fracture. Failure data that can be used to inform macroscopic continuum models of cerami...

Introduction: Currently there exist a number of Mars mesoscale atmospheric models (e.g., [1], [2], [3]), with many more in development and/or testing around the world. In light of this burgeoning worldwide use of such models, it may be useful to describe some of the capabilities that a current Mars mesoscale model may possess. This will be accomplished here by reviewing notable changes and addi...

In FY05, RAL/NSAP modelers continued to work with the U.S. Army Test and Evaluation Command (ATEC), Defense Threat Reduction Agency (DTRA), Defense Advanced Research Project Agency (DARPA), and other public and industrial agencies to study and improve the 4DWX real-time four-dimensional data assimilation and forecast (RTFDDA) system. The work was focused on six areas: (a) transition to the Weat...

Substantial improvements are required in the current suite of numerical models if we are to better understand the present ocean biogeochemical state and predict potential future responses to anthropogenic perturbations. At present, major impediments to marine biogeochemical modeling include the inadequate representation of multi-element cycling and community structure, large-scale physical circ...

The paper provides a review of recent results on mesoscale ocean dynamics derived from satellite altimetry. Since 1992, we have had an unprecedented 15 year high-resolution monitoring of the ocean mesoscale field. Altimetry is often used in mesoscale studies in synergy with other remote sensing techniques and in-situ data. This global, high-resolution data set has allowed oceanographers to quan...

Concrete can be regarded as a composite material comprising aggregates, cement mortar, and an interfacial transition zone (ITZ) at the mesoscale. The mechanical properties durability of concrete are influenced by these three phases. establishment mesoscale model execution numerical simulations constitute efficacious research method. It is method to establishing executing simulations. By this me...

With the multitude of cloud clusters over tropical oceans, it has been perplexing that so few develop into tropical cyclones. The authors postulate that a major obstacle has been the complexity of scale interactions, particularly those on the mesoscale, which have only recently been observable. While there are well-known climatological requirements, these are by no means sufficient. A major rea...

While much is known about DNA structure on the basepair level, this scale represents only a fraction of the structural levels involved in folding the genomic material. With recent advances in experimental and theoretical techniques, a variety of structures have been observed on the fiber, gene, and chromosome levels of genome organization. Here we view chromatin architecture from nucleosomes an...