HydroGeoSphere/Wells

Well domains, can be set up using the following instructions, as outlined in Section 2.3.2.2 and in Equation 2.55. The variable radius corresponds to $$r_s$$, while the pumping rates $$Q_w$$, use the new boundary condition format as described in Section 5.7.

Default Well Properties
Unless the user modifies the default values, all well zones in the domain will be assigned the default properties. The default values, Table 5.8, can be and are recommended to be modified to fit the model application.


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Example Well Instructions
As an example, the following set of instructions, with prefix.wprops file Figure 5.12, could be inserted into the prefix.grok file to produce a pumping well:

The well domain example opens the property file prefix.wprops, shown in Figure 5.12, and creates a 20 m long screen located at x = 100 and y = 100 with a pump intake located at z = 0. The well one properties are read into grok and a steady pumping rate is set at -80 × 10−3 m3 s−1. If the flowrate is set to zero, the well is passive but can still transmit water vertically through its screen.


 * Figure 5.12: Sample well domain property file prefix.wprops


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Radius
Scope: .grok .wprops
 * 1) WellScreenRadius Well Screen Radius [L].

The radius of the screen interval of the well.
 * &bull; &bull; &bull;

Infilled
Scope: .grok .wprops
 * 1) WellPropsInfilled Infilled well properties name from .mprops file.

This command should be included in the input file for an infilled well. The default values are a sand as described in Table 5.7.
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Hagen Poiseuille
Scope: .grok .wprops

This command should be included in the input for the Hagen Poiseuille flow option.
 * &bull; &bull; &bull;

Hazen Williams
Scope: .grok .wprops

This command should be included in the input file for the Hazen Williams flow option.
 * &bull; &bull; &bull;

Manning
<tt>Scope: .grok .wprops</tt>

This command should be included in the input file for the Manning flow option.
 * &bull; &bull; &bull;

Friction
<tt>Scope: .grok .wprops</tt>
 * 1) well_friction Manning’s Well Friction.
 * &bull; &bull; &bull;

Hazen Williams coefficient
<tt>Scope: .grok .wprops</tt>
 * 1) well_hw_coeffient Hazen-Williams well coefficient.
 * &bull; &bull; &bull;

Saturated wells
<tt>Scope: .grok .wprops</tt>

This instruction causes wells to remain fully saturated.
 * &bull; &bull; &bull;

Dual nodes for wells
<tt>Scope: .grok .wprops</tt>

This instruction causes well flow scheme to use dual node approach.
 * &bull; &bull; &bull;

Coupling conductivity
<tt>Scope: .grok .wprops</tt>
 * 1) WellPropsCplCond Coupling conductivity for well [L T−1].

Coupling conductivity parameter only required for the dual node approach for wells.
 * &bull; &bull; &bull;

Coupling length
<tt>Scope: .grok .wprops</tt>
 * 1) WellPropsCplLngth Coupling length for well [L].

Coupling length parameter only required for the dual node approach for wells.
 * &bull; &bull; &bull;