RateBudget Panel
Balance quantities for fluid, mass and heat flow can be calculated and displayed in the budget panels during or after a simulation run. The Rate Budget panel displays the budget (fluidflow rate, massflow rate, heatflow rate) at the current simulation time step. The budget process is available for the entire model domain, or for a selection of calculation nodes or elements, defining the Domain of Interest (DOI).
Use Selection as Budget Domain in the context menu of a stored node or element selection in the Selections panel can to be chosen to make a stored node or element selection available as Domain of Interest (DOI).
Symbol  Description 

Alternatively, the stored element selection that is currently selected in the Selections panel can be added to the list of available selections by hitting this button. 

Remove one of the available selections with this button. 
The rate budget values shown refer to the selection chosen in the dropdown list. If no stored selections have been added in addition, the entire domain as well as the current node and element selections are available.
The results are shown when the Active check box is checked and FEFLOW is in simulator mode. Separate tabs are shown for Flow, Mass (possibly different species), Heat and Age (possibly different species) according to the Problem Class settings.
The boundary flows are divided in negative flows (out of the model/domain of interest  red) and positive flows (into the model/domain of interest  green) and are shown in bars for the different kinds of boundary conditions and the areal/volumetric sources or sinks:
Flow Budget
Budget Component 
Description 

Dirichlet Boundary Conditions 
Flow at Hydraulichead BC nodes 
Neumann Boundary Conditions 
Flow at Fluidflux BC nodes 
Cauchy Boundary Conditions 
Flow at Fluidtransfer BC nodes 
Wells 
Flow at Well BC nodes and Multilayer Well bottom nodes 
Distributed Sink()/Source(+) 
Flow due to Source/Sink and In/Outflow
on Top/Bottom 
Storage Capture()/Release(+) 
Storage capture (left side, negative) and release from storage (right side, positive): both effects of confined storage related to Specific Storage and unconfined storage related to Drain/fillable Porosity or Unsaturated Porosity lumped into one value 
Internal Transfer 
Only for element selection as domain of interest: modelinternal inflow and outflow to/from the domain of interest 
Imbalance 
Sum of all the other values, should be close to 0 (residual massbalance error) 
Mass Transport Budget
Budget Component 
Description 

Dirichlet Boundary Conditions 
Advective mass
flow at Massconcentration
BC nodes 
Neumann Boundary Conditions 
Advective mass flow at Massflux
BC nodes 
Cauchy Boundary Conditions 
Advective mass flow at Masstransfer
BC nodes 
Wells 
Advective mass flow at Mass
nodal sink/source BC nodes 
Distributed Sink()/Source(+) 
Mass flow due to Source/Sink 
Storage Capture()/Release(+) 
Storage capture (left side, negative) and release from storage (right side, positive) 
Internal Transfer 
Only for element selection as domain of interest: modelinternal mass inflow and outflow to/from the domain 
Imbalance 
Sum of all the other values, should be close to 0 (residual massbalance error) 
Heat Transport Budget
Budget Component 
Description 

Dirichlet Boundary Conditions 
Advective heat
flow at Temperature
BC nodes 
Neumann Boundary Conditions 
Advective heat flow at Heatflux
BC nodes 
Cauchy Boundary Conditions 
Advective heat flow at Heattransfer
BC nodes 
Wells 
Advective heat flow at Heat
nodal sink/source BC nodes 
Distributed Sink()/Source(+) 
Heat flow due to Source/Sink, heat flow due to Source/Sink (fluid flow) and In/Outflow on Top/Bottom in the Convective Form 
Storage Capture()/Release(+) 
Storage capture (left side, negative)
and release from storage (right side, positive), 
Internal Transfer 
Only for element selection as domain of interest: modelinternal heat inflow and outflow to/from the domain 
Imbalance 
Sum of all the other values, should be close to 0 (residual massbalance error) 
The calculation of flows of thermal energy per time requires a unique reference for the temperature. FEFLOW uses the Reference Temperature set on the Transport Settings page of the Problem Settings dialog. This means that for example in case of 9°C warm water flowing into an aquifer of 8°C temperature the heat flow at the inflow boundary is shown as negative if the reference temperature has been set to 10°C. 
The budget quantities can also be visualized in the Slice View and 3D View windows by visualizing the respective Rate Budget component from the Data panel. 
In one very specific case the Imbalance does not show the residual massbalance error: If Arbitrary 1D Feature Elements connect nodes outside the DOI with nodes inside the DOI, the flows through these add to the imbalance, as they are not captured by the Internal Transfer through the DOI boundaries. 
Budget Export
The calculated ratebudget values can be exported to a text file (*.txt) via the context menu on the panel ( Export Current Values).
The format used to display the numbers in the bars can be changed by using the Number Format entry in the context menu of the panel.