Pneumatic conveying (fluids.saltation)

fluids.saltation.Rizk(mp, dp, rhog, D)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R931954] as described in [R932954] and many others.

\[ \begin{align}\begin{aligned}\mu=\left(\frac{1}{10^{1440d_p+1.96}}\right)\left(Fr_s\right)^{1100d_p+2.5}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

dp : float

Particle diameter, [m]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearranged to be explicit in terms of saltation velocity internally.

References

[R931954](1, 2) Rizk, F. “Pneumatic conveying at optimal operation conditions and a solution of Bath’s equation.” Proceedings of Pneumotransport 3, paper D4. BHRA Fluid Engineering, Cranfield, England (1973)
[R932954](1, 2) Klinzing, G. E., F. Rizk, R. Marcus, and L. S. Leung. Pneumatic Conveying of Solids: A Theoretical and Practical Approach. Springer, 2013.
[R933954](1, 2) Rhodes, Martin J. Introduction to Particle Technology. Wiley, 2013.

Examples

Example is from [R933954].

>>> Rizk(mp=0.25, dp=100E-6, rhog=1.2, D=.078)
9.8833092829357
fluids.saltation.Matsumoto_1974(mp, rhop, dp, rhog, D, Vterminal=1)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R934957]. Also described in [R935957].

\[ \begin{align}\begin{aligned}\mu = 0.448 \left(\frac{\rho_p}{\rho_f}\right)^{0.50}\left(\frac{Fr_p} {10}\right)^{-1.75}\left(\frac{Fr_s}{10}\right)^{3}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\Fr_p = \frac{V_{terminal}}{\sqrt{gd_p}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

rhop : float

Particle density, [kg/m^3]

dp : float

Particle diameter, [m]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

Vterminal : float

Terminal velocity of particle settling in gas, [m/s]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearranged to be explicit in terms of saltation velocity internally. Result looks high, something may be wrong. For particles > 0.3 mm.

References

[R934957](1, 2) Matsumoto, Shigeru, Michio Kara, Shozaburo Saito, and Siro Maeda. “Minimum Transport Velocity for Horizontal Pneumatic Conveying.” Journal of Chemical Engineering of Japan 7, no. 6 (1974): 425-30. doi:10.1252/jcej.7.425.
[R935957](1, 2) Jones, Peter J., and L. S. Leung. “A Comparison of Correlations for Saltation Velocity in Horizontal Pneumatic Conveying.” Industrial & Engineering Chemistry Process Design and Development 17, no. 4 (October 1, 1978): 571-75. doi:10.1021/i260068a031

Examples

>>> Matsumoto_1974(mp=1., rhop=1000., dp=1E-3, rhog=1.2, D=0.1, Vterminal=5.24)
19.583617317317895
fluids.saltation.Matsumoto_1975(mp, rhop, dp, rhog, D, Vterminal=1)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R936959]. Also described in [R937959].

\[ \begin{align}\begin{aligned}\mu = 1.11 \left(\frac{\rho_p}{\rho_f}\right)^{0.55}\left(\frac{Fr_p} {10}\right)^{-2.3}\left(\frac{Fr_s}{10}\right)^{3}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\Fr_p = \frac{V_{terminal}}{\sqrt{gd_p}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

rhop : float

Particle density, [kg/m^3]

dp : float

Particle diameter, [m]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

Vterminal : float

Terminal velocity of particle settling in gas, [m/s]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearranged to be explicit in terms of saltation velocity internally. Result looks high, something may be wrong. For particles > 0.3 mm.

References

[R936959](1, 2) Matsumoto, Shigeru, Shundo Harada, Shozaburo Saito, and Siro Maeda. “Saltation Velocity for Horizontal Pneumatic Conveying.” Journal of Chemical Engineering of Japan 8, no. 4 (1975): 331-33. doi:10.1252/jcej.8.331.
[R937959](1, 2) Jones, Peter J., and L. S. Leung. “A Comparison of Correlations for Saltation Velocity in Horizontal Pneumatic Conveying.” Industrial & Engineering Chemistry Process Design and Development 17, no. 4 (October 1, 1978): 571-75. doi:10.1021/i260068a031

Examples

>>> Matsumoto_1975(mp=1., rhop=1000., dp=1E-3, rhog=1.2, D=0.1, Vterminal=5.24)
18.04523091703009
fluids.saltation.Matsumoto_1977(mp, rhop, dp, rhog, D, Vterminal=1)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R938961] and reproduced in [R939961], [R940961], and [R941961].

First equation is used if third equation yields d* higher than dp. Otherwise, use equation 2.

\[ \begin{align}\begin{aligned}\mu = 5560\left(\frac{d_p}{D}\right)^{1.43}\left(\frac{Fr_s}{10}\right)^4\\\mu = 0.373 \left(\frac{\rho_p}{\rho_f}\right)^{1.06}\left(\frac{Fr_p} {10}\right)^{-3.7}\left(\frac{Fr_s}{10}\right)^{3.61}\\\frac{d_p^*}{D} = 1.39\left(\frac{\rho_p}{\rho_f}\right)^{-0.74}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\Fr_p = \frac{V_{terminal}}{\sqrt{gd_p}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

rhop : float

Particle density, [kg/m^3]

dp : float

Particle diameter, [m]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

Vterminal : float

Terminal velocity of particle settling in gas, [m/s]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearanged to be explicit in terms of saltation velocity internally.r

References

[R938961](1, 2) Matsumoto, Shigeru, Makoto Kikuta, and Siro Maeda. “Effect of Particle Size on the Minimum Transport Velocity for Horizontal Pneumatic Conveying of Solids.” Journal of Chemical Engineering of Japan 10, no. 4 (1977): 273-79. doi:10.1252/jcej.10.273.
[R939961](1, 2) Klinzing, G. E., F. Rizk, R. Marcus, and L. S. Leung. Pneumatic Conveying of Solids: A Theoretical and Practical Approach. Springer, 2013.
[R940961](1, 2) Gomes, L. M., and A. L. Amarante Mesquita. “On the Prediction of Pickup and Saltation Velocities in Pneumatic Conveying.” Brazilian Journal of Chemical Engineering 31, no. 1 (March 2014): 35-46. doi:10.1590/S0104-66322014000100005
[R941961](1, 2) Rabinovich, Evgeny, and Haim Kalman. “Threshold Velocities of Particle-Fluid Flows in Horizontal Pipes and Ducts: Literature Review.” Reviews in Chemical Engineering 27, no. 5-6 (January 1, 2011). doi:10.1515/REVCE.2011.011.

Examples

Example is only a self-test.

Course routine, terminal velocity input is from example in [2].

>>> Matsumoto_1977(mp=1., rhop=1000., dp=1E-3, rhog=1.2, D=0.1, Vterminal=5.24)
16.64284834446686
fluids.saltation.Schade(mp, rhop, dp, rhog, D)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R942965] as described in [R943965], [R944965], [R945965], and [R946965].

\[ \begin{align}\begin{aligned}Fr_s = \mu^{0.11}\left(\frac{D}{d_p}\right)^{0.025}\left(\frac{\rho_p} {\rho_f}\right)^{0.34}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

rhop : float

Particle density, [kg/m^3]

dp : float

Particle diameter, [m]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearranged to be explicit in terms of saltation velocity internally.

References

[R942965](1, 2) Schade, B., Zum Ubergang Sprung-Strahnen-forderung bei der Horizontalen Pneumatischen Feststoffordrung. Dissertation, University of Karlsruche (1987)
[R943965](1, 2) Rabinovich, Evgeny, and Haim Kalman. “Threshold Velocities of Particle-Fluid Flows in Horizontal Pipes and Ducts: Literature Review.” Reviews in Chemical Engineering 27, no. 5-6 (January 1, 2011). doi:10.1515/REVCE.2011.011.
[R944965](1, 2) Setia, G., S. S. Mallick, R. Pan, and P. W. Wypych. “Modeling Minimum Transport Boundary for Fluidized Dense-Phase Pneumatic Conveying Systems.” Powder Technology 277 (June 2015): 244-51. doi:10.1016/j.powtec.2015.02.050.
[R945965](1, 2) Bansal, A., S. S. Mallick, and P. W. Wypych. “Investigating Straight-Pipe Pneumatic Conveying Characteristics for Fluidized Dense-Phase Pneumatic Conveying.” Particulate Science and Technology 31, no. 4 (July 4, 2013): 348-56. doi:10.1080/02726351.2012.732677.
[R946965](1, 2) Gomes, L. M., and A. L. Amarante Mesquita. “On the Prediction of Pickup and Saltation Velocities in Pneumatic Conveying.” Brazilian Journal of Chemical Engineering 31, no. 1 (March 2014): 35-46. doi:10.1590/S0104-66322014000100005

Examples

>>> Schade(mp=1., rhop=1000., dp=1E-3, rhog=1.2, D=0.1)
13.697415809497912
fluids.saltation.Weber_saltation(mp, rhop, dp, rhog, D, Vterminal=4)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R947970] as described in [R948970], [R949970], [R950970], and [R951970].

If Vterminal is under 3 m/s, use equation 1; otherwise, equation 2.

\[ \begin{align}\begin{aligned}Fr_s = \left(7 + \frac{8}{3}V_{terminal}\right)\mu^{0.25} \left(\frac{d_p}{D}\right)^{0.1}\\Fr_s = 15\mu^{0.25}\left(\frac{d_p}{D}\right)^{0.1}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

rhop : float

Particle density, [kg/m^3]

dp : float

Particle diameter, [m]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

Vterminal : float

Terminal velocity of particle settling in gas, [m/s]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearranged to be explicit in terms of saltation velocity internally.

References

[R947970](1, 2) Weber, M. 1981. Principles of hydraulic and pneumatic conveying in pipes. Bulk Solids Handling 1: 57-63.
[R948970](1, 2) Rabinovich, Evgeny, and Haim Kalman. “Threshold Velocities of Particle-Fluid Flows in Horizontal Pipes and Ducts: Literature Review.” Reviews in Chemical Engineering 27, no. 5-6 (January 1, 2011). doi:10.1515/REVCE.2011.011.
[R949970](1, 2) Setia, G., S. S. Mallick, R. Pan, and P. W. Wypych. “Modeling Minimum Transport Boundary for Fluidized Dense-Phase Pneumatic Conveying Systems.” Powder Technology 277 (June 2015): 244-51. doi:10.1016/j.powtec.2015.02.050.
[R950970](1, 2) Bansal, A., S. S. Mallick, and P. W. Wypych. “Investigating Straight-Pipe Pneumatic Conveying Characteristics for Fluidized Dense-Phase Pneumatic Conveying.” Particulate Science and Technology 31, no. 4 (July 4, 2013): 348-56. doi:10.1080/02726351.2012.732677.
[R951970](1, 2) Gomes, L. M., and A. L. Amarante Mesquita. “On the Prediction of Pickup and Saltation Velocities in Pneumatic Conveying.” Brazilian Journal of Chemical Engineering 31, no. 1 (March 2014): 35-46. doi:10.1590/S0104-66322014000100005

Examples

Examples are only a self-test.

>>> Weber_saltation(mp=1, rhop=1000., dp=1E-3, rhog=1.2, D=0.1, Vterminal=4)
15.227445436331474
fluids.saltation.Geldart_Ling(mp, rhog, D, mug)[source]

Calculates saltation velocity of the gas for pneumatic conveying, according to [R952975] as described in [R953975] and [R954975].

if Gs/D < 47000, use equation 1, otherwise use equation 2.

\[ \begin{align}\begin{aligned}V_{salt} = 1.5G_s^{0.465}D^{-0.01} \mu^{0.055}\rho_f^{-0.42}\\V_{salt} = 8.7G_s^{0.302}D^{0.153} \mu^{0.055}\rho_f^{-0.42}\\Fr_s = 15\mu^{0.25}\left(\frac{d_p}{D}\right)^{0.1}\\Fr_s = \frac{V_{salt}}{\sqrt{gD}}\\\mu = \frac{m_p}{\frac{\pi}{4}D^2V \rho_f}\\G_s = \frac{m_p}{A}\end{aligned}\end{align} \]
Parameters:

mp : float

Solid mass flow rate, [kg/s]

rhog : float

Gas density, [kg/m^3]

D : float

Diameter of pipe, [m]

mug : float

Gas viscosity, [Pa*s]

Returns:

V : float

Saltation velocity of gas, [m/s]

Notes

Model is rearranged to be explicit in terms of saltation velocity internally.

References

[R952975](1, 2) Weber, M. 1981. Principles of hydraulic and pneumatic conveying in pipes. Bulk Solids Handling 1: 57-63.
[R953975](1, 2) Rabinovich, Evgeny, and Haim Kalman. “Threshold Velocities of Particle-Fluid Flows in Horizontal Pipes and Ducts: Literature Review.” Reviews in Chemical Engineering 27, no. 5-6 (January 1, 2011). doi:10.1515/REVCE.2011.011.
[R954975](1, 2) Gomes, L. M., and A. L. Amarante Mesquita. “On the Prediction of Pickup and Saltation Velocities in Pneumatic Conveying.” Brazilian Journal of Chemical Engineering 31, no. 1 (March 2014): 35-46. doi:10.1590/S0104-66322014000100005

Examples

>>> Geldart_Ling(1., 1.2, 0.1, 2E-5)
7.467495862402707