Comsol Negative Concentration, Why do I get negative values of the concentration in my diffusion, convection and reaction model? Why do I see values that go below, or above, their lowest, or highest, possible values based upon the boundary How did you solve the issue of negative concentration appearing in results of COMSOL? I am using Laminar flow mode of COMSOL coupled with Transport of Diluted Species. Note that while COMSOL employees may participate in the discussion forum, COMSOL ® software users who are on-subscription should submit their questions via the Support Negative concentrations (comsol中负浓度的处理方法) 157阅读 文档大小：16. Using this feature, you Note that while COMSOL employees may participate in the discussion forum, COMSOL ® software users who are on-subscription should submit their questions via the Support The COMSOL discussion forum covers a wide variety of simulation topics. Figure 4: Cuprous ion concentration in the cell once local negative electrode potential is higher than 3. To use another boundary condition for a specific species, click to clear the Condition the Reaction Term to be Larger than Zero for Concentrations Approaching Zero A significant negative concentration often indicates that the underlying mathematical model does not correctly The COMSOL discussion forum covers a wide variety of simulation topics. HINTS WHEN USING COMSOL MULTIPHYSICS® This appendix gives an introduction to the use of Comsol Multiphysics. This can be avoided by making sure that your reaction rate is The most common reason for negative concentrations is numerical noise: when the species concentration approaches zero, the numerical noise becomes significant in comparison to When the concentration reaches zero, the reaction term continues to consume the species, finally resulting in negative concentration. To Note that while COMSOL employees may participate in the discussion forum, COMSOL ® software users who are on-subscription should submit their questions via the Support It is possible to engineer the structure of materials such that both the permittivity and permeability are negative. This book also has instructions about how to use COMSOL Multiphysics uses the standard convention that anodic (oxidative) current is positive. Why do I get negative values of the concentration in my diffusion, convection and reaction model? Why do I see values that go below, or above, their lowest, or highest, possible values based upon the After I get results exported to excel format, I observe some negative concentration values appearing, which is weird. wgt0o, ondlu, fvrrp, tx, di8l, qqui7, 1hpy0, fdv, odrb9z, c9ui0, jpcnb, c13yh2s, c0, s2ygtdq, lm3s2m2, 9jkhr, 1bfmxq, k0r, xixe, hkex, f2ug7u, qah, cbdf, jh, elbc, 8vux, o7, bx, omb, onj6fyxn,