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GWB10 is here!

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Dear GWB users,

The newest generation of The Geochemist's Workbench®, GWB10, is here!

GWB10 is better, easier, faster! Our major upgrade features colloid-facilitated transport, a central dashboard, undo-redo in GSS, the TEdit thermo data editor, MATLAB bindings, axisymmetric coordinates, turbo scripting and much more. And it's Windows 8 friendly. You can upgrade now for a fraction of the cost of a new license!

Please feel free to contact me by email (sales@gwb.com) or telephone (217-531-1206) with any questions you may have.


Brian Farrell


Aqueous Solutions LLC

Makers of The Geochemist’s Workbench

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  • 1 year later...

Hi Hong,


Field variables, like specific surface area, can be described by simple equations, scripts in the Basic language, or by C++ functions. The program will evaluate your expression at the beginning of the simulation. For certain field variables, known as transient field variables, the expression can be evaluated at every time step. The Heterogeneity Appendix in the GWB Transport Modeling Guide describes how to set field variables. Your expressions can access the parameters in table A.1 in that Guide. Here's a little more information about setting field variables.


The procedure for setting custom rate laws (to describe the rate of kinetic reactions) is similar, but you have a little more power in that you're able to access a wider range of parameters. Section 5, Custom Rate Laws, in the GWB Reaction Modeling Guide describes how to set rate laws as character strings, basic scripts, or C++ functions. You can access the internal parameters in Table 5.1 and the helper functions in Table 5.2 in the Reaction Modeling Guide. If you're writing a Basic script (for field variables or for custom rate laws) you can refer to the syntax described in Table 5.3 of the Reaction Modeling Guide.


Hope this helps,


Brian Farrell

Aqueous Solutions

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