# CFD Analysis of the Pressure Drop Caused by the Screen Blockage Rate in a Membrane Strainer

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## Abstract

**:**

## 1. Introduction

## 2. Design and Conditions for Numerical Analysis of Autostrainer

#### 2.1. Autostrainer Screen Shape Design

#### 2.1.1. Shape and Dimensions of Screens in Autostrainers

#### 2.1.2. Design of Autostrainer Screens

#### 2.1.3. Application of CFD to Autostrainers

#### 2.2. Shape Modeling and Grid System Construction for CFD Analysis

#### 2.2.1. Shape Modeling and Grid System

- Application of CFD for the cross-section of the slot (2D shape)

- Application of CFD to autostrainers (3D-shape)

**Figure 6.**Modeling of the 2D shape of the slot cross-section. (

**a**) Scenario 1. (

**b**) Scenario 2. (

**c**) Scenario 3.

- Composition of the space grid system for CFD

#### 2.2.2. Numerical Approach

#### 2.2.3. Boundary Condition for Numerical Analysis

## 3. Experimental Results and Analysis by Scenario

#### 3.1. Two-Dimensional Analysis Results for Each Scenario

#### 3.2. Comparison between the Test Results of Pressure Differences and the Results of CFD for Autostrainers

#### 3.3. Analysis Results of 3D CFD According to the Screen Blockage Rate

## 4. Discussion—Design Parameters

#### 4.1. Headloss Coefficient (K), Flow Coefficient (Cv), Discharge Coefficient (Cd)

^{2}), and v is velocity (m/s).

#### 4.2. Additional Consideration (Particle Settling Rate)

## 5. Conclusions

## Author Contributions

## Funding

## Data Availability Statement

## Acknowledgments

## Conflicts of Interest

## References

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**Figure 8.**Two-Dimensional Analysis Results for Each Scenario. (

**a**) Blockage rate 0%. (

**b**) Scenario 1—Blockage rate 50%. (

**c**) Scenario 2—Blockage rate 50%. (

**d**) Scenario 3—Blockage rate 50%.

**Figure 9.**Pressure drop (2D) according to inlet velocity conditions. (

**a**) Scenario 1. (

**b**) Scenario 2. (

**c**) Scenario 3.

**Figure 11.**Results of the experiment and CFD. (

**a**) Differential in-out pressure. (

**b**) Headloss coefficient.

**Figure 17.**Coefficients of headloss and discharge of the application of the local blockage rate to the screen.

Blockage Rate (%) | Headloss Coefficient (K) | Flow Coefficient (Cv) | Discharge Coefficient (Cd) |
---|---|---|---|

0 | 5.150 | 816.055 | 0.441 |

10 | 5.395 | 797.258 | 0.431 |

20 | 5.752 | 772.161 | 0.417 |

30 | 6.267 | 739.745 | 0.399 |

40 | 7.097 | 695.109 | 0.375 |

50 | 8.479 | 635.952 | 0.343 |

Blockage Rate (%) | Headloss Coefficient (K) | Flow Coefficient (Cv) | Discharge Coefficient (Cd) |
---|---|---|---|

0–10 | 5.223 | 810.296 | 0.438 |

10–20 | 5.515 | 788.583 | 0.426 |

20–30 | 5.940 | 759.830 | 0.410 |

30–40 | 6.587 | 721.519 | 0.390 |

40–50 | 7.651 | 669.486 | 0.32 |

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**MDPI and ACS Style**

Min, I.; Choi, J.; Kim, G.; Jo, H.
CFD Analysis of the Pressure Drop Caused by the Screen Blockage Rate in a Membrane Strainer. *Processes* **2024**, *12*, 831.
https://doi.org/10.3390/pr12040831

**AMA Style**

Min I, Choi J, Kim G, Jo H.
CFD Analysis of the Pressure Drop Caused by the Screen Blockage Rate in a Membrane Strainer. *Processes*. 2024; 12(4):831.
https://doi.org/10.3390/pr12040831

**Chicago/Turabian Style**

Min, Inhong, Jongwoong Choi, Gwangjae Kim, and Hyunsik Jo.
2024. "CFD Analysis of the Pressure Drop Caused by the Screen Blockage Rate in a Membrane Strainer" *Processes* 12, no. 4: 831.
https://doi.org/10.3390/pr12040831