What is Falling Rate Period Drying?
The falling rate drying period is a stage in the drying process where the rate of moisture removal from the material decreases over time as the internal moisture content of the material is reduced. During this period, the drying rate is typically controlled by the rate of moisture diffusion within the material, which is slower than the rate of heat and mass transfer at the surface of the material. In this stage, the moisture content of the material decreases more slowly than during the constant rate drying period, as the remaining moisture is located deeper within the material and must diffuse to the surface before it can be removed. The length of the falling rate period depends on the properties of the material being dried, such as its porosity, particle size, and moisture distribution.
How to Calculate Final Moisture Content based on Initial to Final Moisture Content for Falling Rate Period?
Final Moisture Content based on Initial to Final Moisture Content for Falling Rate Period calculator uses Final Moisture Content for Falling Rate Period = ((Initial Moisture Content for Falling Rate Period-Equilibrium Moisture Content)/(exp((Drying Surface Area*Falling Rate Drying Time*Rate of Constant Drying Period)/(Dry Weight of Solid*(Initial Moisture Content for Falling Rate Period-Equilibrium Moisture Content)))))+Equilibrium Moisture Content to calculate the Final Moisture Content for Falling Rate Period, The Final Moisture Content based on Initial to Final Moisture Content for Falling Rate Period formula is defined as the final moisture content that can be attained from the specified initial moisture content based on the drying conditions in falling rate period. Final Moisture Content for Falling Rate Period is denoted by Xf(Falling) symbol.
How to calculate Final Moisture Content based on Initial to Final Moisture Content for Falling Rate Period using this online calculator? To use this online calculator for Final Moisture Content based on Initial to Final Moisture Content for Falling Rate Period, enter Initial Moisture Content for Falling Rate Period (Xi(Falling)), Equilibrium Moisture Content (XEq), Drying Surface Area (A), Falling Rate Drying Time (tf), Rate of Constant Drying Period (Nc) & Dry Weight of Solid (WS) and hit the calculate button. Here is how the Final Moisture Content based on Initial to Final Moisture Content for Falling Rate Period calculation can be explained with given input values -> 0.061382 = ((0.1-0.05)/(exp((0.1*37*2)/(100*(0.1-0.05)))))+0.05.