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failed to find consistent intial values
Posted 2015年7月14日 GMT-4 23:38 Chemical Reaction Engineering, Studies & Solvers Version 5.0 1 Reply
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I am trying to model the biochemical interactions between an inflammatory cytokine and biomolecules present in cartilage tissue. The cartilage tissue in the model is represented by a rectangular domain of width 1.5 mm and height of 1 mm. I have been successful in developing this model for cartilage degradation using comsol. However, we now want to simulate the transport and interaction of candidate drugs with the cytokine and biomolecules present in the cartilage. To solve this problem we first divided the problem into 2 distinct models (see attached file, IL-1 diffusion test R4(test) R-1.mph). The geometry for the second model (comp 1) is a slight modification to the original geometry used for model 1. It basically represents a layer of fluid surrounding the cartilage tissue and contains sodium chloride and the candidate drug. The sodium ion, chloride ion and drug are transported by passive diffusion and due to differences in electrostatic potential between the tissue and the fluid surrounding it. The charge distribution in the tissue depends on the tissue aggrecan concentration, which is mapped from model 1 using the "idmap" operator. This model too worked successfully in comsol. For the next step, I introduced a chemical reaction term to represent the interaction between the drug and the cytokine IL-1 (see attached file, IL-1 diffusion test R4(test) R2.mph). However, I keep getting an error message "Failed to find appropriate initial conditions". Could you please let me know if there are any ways to solve this problem.
Regards,
Saptarshi
Regards,
Saptarshi
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1 Reply Last Post 2015年7月15日 GMT-4 18:38