MDS - Moisture Diffusion Software

• MDS is a moisture diffusion analysis software program for predicting water uptake, diffusion and internal distribution through the thickness of multilayer composite materials by finite difference method.
• Effect of material variation boundary conditions and layer thicknesses can be studied in real time.
• Model assumes that diffusion coefficient, density, equilibrium saturation are constant throughout analysis (can modify this as needed).
• Model is appropriate as long as interface points are included in the set of finite difference grid points.

MDS INputs

• Layer Information:
  • Thickness, (cm), Diffusion Coefficient (cm*cm/sec), Dry density, (g/cc), Equilibrium Solubility Of H 2 O, no of Finite difference nodes
• Boundary and Initial Conditions:
• Top and Bottom relative humidity (%) outside of the sample, known initial H 2 O concentration (given or zero), relative humidity at which Equilibrium solubilities were measured.
• Analysis Information:
  • Final time, time step (sec, min, hour, week month year), no. of solution steps, output interval, Crank Nicolson or implicit solution scheme, plate size information to determine total moisture uptake.

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