recordMolz1983
Extends from Records.Subsurface_Basic (basic subsurface parameters with default values).
Information
1. Purpose of model
Subsurface parameter record with values taken from the well doublet field experiment described in Molz et al. (1983). Intended as a reference parameter set for validation studies of high-temperature aquifer thermal energy storage (HT-ATES) models.
2. Level of detail, physical effects considered, and physical insight
(Purely technical component without physical modeling.)
3. Limits of validity
- Values represent a shallow sand aquifer at the Auburn University test site (Alabama, USA).
- Initial aquifer temperature is 293.15 K (20°C).
4. Interfaces
(no elements)
5. Nomenclature
 |
lambda_l |
fluid thermal conductivity = 0.61 W/(m·K) |
 |
rho_s |
solid density = 2600 kg/m³ |
 |
Cp_s |
specific heat capacity of solid = 696.15 J/(kg·K) |
|
lambda_s |
solid thermal conductivity = 2.85 W/(m·K) |
 |
n |
aquifer porosity = 0.25 [-] |
 |
k_v |
vertical permeability = 9×10-12 m² |
 |
k |
radial permeability = 6.3×10-11 m² |
 |
T_initial |
initial aquifer temperature = 293.15 K (20°C) |
6. Governing Equations
(no equations)
7. Remarks for Usage
Use this record in conjunction with Val_homogenLayer to reproduce the Molz et al. (1983) well doublet experiment.
8. Validation
Tested in check model "ATES.Validierung.Buoyancy.Val_homogenLayer"
9. References
Molz, F. J., Melville, J. G., Parr, A. D., King, D. A., & Hopf, M. T. (1983): Aquifer thermal energy storage: a well doublet experiment at increased temperatures. Water Resources Research, 19(1), 149–160.
10. Version History
Model created by Markus Gillner (markus.gillner@tuhh.de), May 2026
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Property values › fluid properties | |||
| SI.Density | rho_l (from Subsurface_Basic) | 988.04 | Density of fluid, default: density of water at 50°C |
| SI.DynamicViscosity | eta (from Subsurface_Basic) | 0.466*10^(-3) | Dynamic Viscosity of fluid, default: dynamic viscosity of water at 50°C |
| SI.SpecificHeatCapacity | Cp_l (from Subsurface_Basic) | 4181.5 | Specific Heat Capacity of fluid, default: capacity of water at 50 °C |
| SI.ThermalConductivity | lambda_l (from Subsurface_Basic) | 0.64 | Heat Conductivity of the fluid, default: conductivity of water at 50°C |
| Real | C_w (from Subsurface_Basic) | 4.03*10^6 | volumetric Heat Capacity of fluid, default: capacity of water at 50°C |
| Property values › matrix properties in aquifer | |||
| SI.Density | rho_s (from Subsurface_Basic) | 2000 | Density of solid |
| SI.SpecificHeatCapacity | Cp_s (from Subsurface_Basic) | 900 | Specific Heat Capacity of solid |
| SI.ThermalConductivity | lambda_s (from Subsurface_Basic) | 2.56 | Heat Conductivity of the solid |
| Real | n (from Subsurface_Basic) | 0.25 | Porosity of the aquifer |
| Real | C_a (from Subsurface_Basic) | 1.81*10^6 | volumetric Heat Capacity of aquifermatrix |
| SI.Area | k_v (from Subsurface_Basic) | 0.5*10^(-12) | Vertical permeability of aquifer, mostly kv=0.1*k |
| SI.Area | k (from Subsurface_Basic) | 25*10^(-12) | Radial permeability of aquifer |
| Property values › property values of solid in confining layers | |||
| Real | n_c (from Subsurface_Basic) | 0.35 | Porosity of the confining layers |
| SI.Density | rho_sc (from Subsurface_Basic) | 2000 | Density of solid in confing layers |
| SI.SpecificHeatCapacity | Cp_sc (from Subsurface_Basic) | 900 | Specific Heat Capacity of solid in confining layers |
| SI.ThermalConductivity | lambda_sc (from Subsurface_Basic) | 2.56 | Heat Conductivity of the solid in confining layers |
| Property values › property values of whole aquifer and confining layers | |||
| SI.Density | rho (from Subsurface_Basic) | n*rho_l + (1 - n)*rho_s | Density of aquifer |
| SI.Density | rho_c (from Subsurface_Basic) | n_c*rho_l + (1 - n_c)*rho_sc | Density of aquitard |
| SI.SpecificHeatCapacity | Cp (from Subsurface_Basic) | n*Cp_l + (1 - n)*Cp_s | Specific Heat Capacity of aquifer |
| SI.SpecificHeatCapacity | Cp_c (from Subsurface_Basic) | n_c*Cp_l + (1 - n_c)*Cp_sc | Specific Heat Capacity of aquitard |
| Real | C (from Subsurface_Basic) | n*C_w + (1 - n)*C_a | Volumetric heat capacity of aquifer |
| SI.ThermalConductivity | lambda_c (from Subsurface_Basic) | n_c*lambda_l + (1 - n_c)*lambda_sc | Heat Conductivity of the aquitard |
| SI.ThermalConductivity | lambda_a (from Subsurface_Basic) | n*lambda_l + (1 - n)*lambda_s | Heat Conductivity of the aquifer |
| SI.Length | d_h (from Subsurface_Basic) | 0.7 | horizontal dispersion coefficient |
| SI.Length | d_v (from Subsurface_Basic) | 0.05 | vertical dispersion coefficient |
| Property values › Initial values | |||
| SI.Pressure | p_initial (from Subsurface_Basic) | 1000000 | inital pressure in aquifer at example 100 bar at the lowest point of the well |
| SI.Temperature | T_initial (from Subsurface_Basic) | 311.15 | initial temperature in aquifer at t=0s |