Last Updated October 18, 2019

Overview

TEMP/W is a finite element CAD software product for analyzing thermal changes in the ground due to environmental factors or the construction of facilities such as buildings or pipelines. The comprehensive formulation makes it possible to analyze both simple and highly complex geothermal problems. TEMP/W can be applied to the geothermal analysis and design of geotechnical, civil, and mining engineering projects, including facilities subjected to freezing and thawing temperature changes.

Key Features

CONVECTIVE BOUNDARY

The convective heat transfer boundary condition simulates artificial ground freezing or other processes involving the flow of fluid over or within a bounding surface.

FORCED CONVECTION

Heat transfer is often governed by forced convection in natural hydrogeological systems. TEMP/W can be fully-integrated with SEEP/W or AIR/W to analyze heat transfer via groundwater flow or air flow, respectively.

LAND CLIMATE INTERACTION

Analyze problems that involve a coupling between climatic conditions and the thermal response within the ground in TEMP/W using the surface energy balance boundary condition.

MODEL THERMOSYPHONS

TEMP/W implements a rigorous thermosyphon boundary condition that can accommodate either two-dimensional or pseudo-3D analysis of thermosyphons.

TEMP/W models a full range of heat transfer problems

DESIGN OF GROUND FREEZING SYSTEMS

Controlling groundwater flow and stabilizing ground is critical in many tunnelling, waste management, and civil engineering projects. The convective surface and thermosyphon boundary conditions in TEMP/W can be used to analyze and design ground freezing systems in porous media. Combined with SEEP/W and AIR/W, forced-convection heat transfer can be analyzed in even the most challenging physical systems.

EFFECT OF CLIMATE CHANGE ON INFRASTRUCTURE

TEMP/W is used worldwide to analyze the effect of climate change on infrastructure located in northern regions. The sophisticated surface energy balance boundary condition models the exchange of thermal energy at the ground surface for a breadth of climatic and ground cover conditions. The rigorous phase change formulation provides an accurate solution to problems involving freeze-thaw of saturated-unsaturated porous media.

DESIGN OF WASTE COVER SYSTEMS

Cover systems for mine waste, landfills, and mine reclamation in northern regions often involve complex thermal and hydraulic behaviour that effect long-term performance of these structures. TEMP/W provides the ideal tool for understanding the thermal response of saturated-unsaturated cover systems and may be combined with SEEP/W and CTRAN/W to analyze moisture and solute movement in seasonally frozen systems.

SNOWMELT INFILTRATION

In seasonally frozen environments, snowmelt is typically the dominant water input to a watershed. Infiltration into frozen ground has a significant impact on run-off and the behaviour of engineered systems. Thus, understanding snowmelt infiltration is critical to managing water movement in agricultural and engineered systems. TEMP/W can be used to simulate snowmelt and the corresponding infiltration into the ground.

VIEWING THE ANALYSIS RESULTS

Once you have solved your geothermal analysis, TEMP/W offers many tools for viewing results. Generate contours or x-y plots of any computed parameter, such as temperature, flux, gradient, latent heat, or net radiation. Gradient vectors show the energy flow direction and rate. Transient conditions can be shown by plotting the changing frost front position over time. View energy flow paths and flux quantities. Interactively query computed values by clicking on any node, element Gauss region, or flux section. Then prepare the results for your report by adding labels, axes, and pictures, or export the results into other applications such as Microsoft® Excel® for further analysis.

Typical Applications

TEMP/W can model almost any geothermal problem, including:

  • Degradation of permafrost beneath warm buildings or around a warm, buried pipeline
  • Development of a frost bulb around a chilled pipeline
  • Ground freezing for soil stabilization, including use of freezing pipes around mine shafts or thermosyphons on top of earth dams
  • Freeze-thaw action beneath roadways and airport runways
  • Frost depth penetration beneath chilled structures such as a recreational ice surface or a highway during winter
  • Effectiveness of various insulation alternatives for reducing freezing and/or thawing
  • plus many more!

The Power Of Integration

TEMP/W offers simple but powerful analytical capabilities when used in combination with other GeoStudio products.

INTEGRATED WATER TRANSFER WITH SEEP/W

Density-dependent fluid flow forms when temperature variations cause significant density differences. Fluid movement in turn influences the temperature distribution throughout the domain. A coupled TEMP/W and SEEP/W analysis allows for the simultaneous simulation of heat and water movement associated with density-dependent flow.

INTEGRATED AIR TRANSFER WITH AIR/W

TEMP/W can use the air fluxes from AIR/W to model forced-convection heat transfer. TEMP/W can also be integrated with AIR/W to model density-dependent air flow.

INTEGRATED HEAT, WATER AND GAS TRANSFER

Water, energy and gas transfers within the unsaturated zone are often complex and inter-related processes. TEMP/W coupled with SEEP/W and CTRAN/W can simulate these processes and provide insight on vadose zone hydrology.