tune the Sod tube driving script and validate the result

Originally reported by: **Taihsiang Ho (BitBucket: [tai271828](http://bitbucket.org/tai271828), GitHub: [tai271828](http://github.com/tai271828))**

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issue #112 prepared a driven script which is not fully validated yet.
I want to tune this driven script and make it pass the unit tests from issue #127

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- Bitbucket: https://bitbucket.org/solvcon/solvcon/issue/128
