Description
Return bedVolume = flow*emptyBedContactTime.
Nominal hydraulic ratios connect flow to area, length, volume or travel time. These local terms depend on active geometry and steady conditions; they do not describe a full distribution of velocities, residence times or treatment performance.
Return bedVolume = flow*emptyBedContactTime.
When to use this tool
Use Filter BED Contact Volume Factor when checking one supplied hydraulic loading, clearance, volume or travel-time term.
How to use the tool and how it works
- Enter flow, emptyBedContactTime. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read bedVolume. Use the output convention below.
Require nonnegative flow and emptyBedContactTime. Return bedVolume = flow*emptyBedContactTime. Use flow volume per time and contact time on the same time basis, such as m³/hour times hours giving m³.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| flow | Volume per time, on the concentration and duration unit basis used in the formula. | Required. Finite number; minimum 0. |
| emptyBedContactTime | Nominal whole-bed contact time, on the same time basis as flow. | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| bedVolume | Bed Volume | Required. Finite number. |
{
"input": {
"flow": 2,
"emptyBedContactTime": 3
},
"output": {
"bedVolume": 6
}
}Limitations and assumptions
- Empty-bed contact time uses whole bed volume, not water-filled void volume. This inversion does not select a sufficient contact time, adsorption capacity, media type or a validated treatment design.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use a complete hydraulic and treatment model when changing flows, turbulence, media behavior or safety margins matter.
References
Similar or alternative tools
- Activated Carbon Empty BED Contact Time
Return emptyBedMinutes = 60*bedVolume/flowPerHour and voidResidenceMinutes = emptyBedMinutes*voidFraction.
- Filter Media Empty BED Volume Tool
Calculate filter media gross empty-bed volume from explicit area and depth without estimating pore volume or treatment performance.