multiphysics finite element physical modeling program  (COMSOL Inc)

Journal: Science Advances

Article Title: A shallow mantle source for the Chang’e 5 lavas reveals how top-down heating prolonged lunar magmatism

doi: 10.1126/sciadv.adr1486

Figure Lengend Snippet: ( A , C , and E ) The geometries and boundary conditions of COMSOL Multiphysics finite element thermal models for schematic cross sections of the crust and upper mantle in the region of the CE5 landing site. Compositions and thermal conductivities used for all models are shown in (A) and discussed in Materials and Methods. The upper KREEP layer represents Imbrium ejecta to the east of the CE5 landing site and begins generating heat at 3.9 Ga in all models. The lower KREEP layer has the composition of high-K KREEP . See Materials and Methods for more details on initial model conditions. ( B , D , and F ) Model results showing the temperature profiles of the crust and upper mantle at 2 Ga for each model. As these models are purely conductive and absolute temperatures are not necessarily applicable to the mantle, but rather these models show the relative heating effects of a subcrustal KREEP layer of either 5 km (D) or 10 km (F) thickness.

Article Snippet: A series of two-dimensional thermal evolution models for a simplified east-west cross section of the local region of the Moon in northern Oceanus Procellarum where the CE5 basalts were collected were constructed using the COMSOL Multiphysics finite element physical modeling program.

Techniques:

Journal: Materials Horizons

Article Title: Hydrogel-based thermoelectrochemical cells for waste heat recovery under passive cooling conditions †

doi: 10.1039/d5mh00771b

Figure Lengend Snippet: (a) The output power measured experimentally for TEC cells with different electrode separation ( i.e. electrolyte or hydrogel thickness) as a function of voltage. (b) V oc and current density calculated with a complete COMSOL multiphysics simulation as a function of electrode separation. (c) The experimental result for the maximum output power as a function of electrode separation along with a 3rd-order polynomial fit just to underline the trend. (d) The convection velocity at the electrode/electrolyte interface obtained for cells with 10 mm width and different heights, explaining the reason for the performance decay after 20 mm (obtained from simulations).

Article Snippet: Using a comprehensive COMSOL Multiphysics model (Fig. S3 with parameters reported in Table S1, ESI ), we compare the thermal behavior of a conventional liquid electrolyte and a hydrogel-based electrolyte as a function of the electrode separations, while keeping the lateral dimensions of the cell constant (width W = 10 mm and depth D = 10 mm).

Techniques: Convection