woodward Posted June 12, 2009 Report Share Posted June 12, 2009 (edited) I am running a contaminant transport model in FEMWATER.I am wondering if I have set up the dispersion coefficient parameters correctly.In the FEMWATER manual it gives the equation for the D tensor astheta D = aT |V| delta + (aL-aT) V^2 / |V| + am theta tau deltawheretheta is the moisture content (not the porosity)delta is the Kronecker delta function (basically an identity matrix)am * tau is the molecular diffusivity D*V is the fluid velocity aL is the longitudianl dispersivityaT is the transverse dispersivityMy problem is the first theta. In all the other references I have seen it is not there, for example Zheng & Bennett 2002. I am wondering if it is a typo. If it is not a typo then the parameters in this equation are different the usual form such as given in Zheng & Bennett and it would make a big difference.Would appreciate your help. Thanks.Edit: Update: Actually V in the above equation is the Darcy velocity = theta * Fluid (seepage) velocity. So theta appears in every term. It seems this equation is the correct form for unsaturated conditions. My mistake. Edited January 11, 2010 by woodward 1 Quote Link to comment Share on other sites More sharing options...
woodward Posted July 2, 2009 Author Report Share Posted July 2, 2009 (edited) Edit: Deleted. Edited January 11, 2010 by woodward 1 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.