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Magazine articles
1995 TAPPI/FBI corrugated productivity survey, TAPPI JOURNAL, November 1996, Vol. 79(11)
1995 TAPPI/FBI corrugated productivity survey, TAPPI JOURNAL, November 1996, Vol. 79(11)
Magazine articles
ISO 9000 registration-avoiding unnecessary procedures, TAPPI JOURNAL, November 1996, Vol. 79(11)
ISO 9000 registration-avoiding unnecessary procedures, TAPPI JOURNAL, November 1996, Vol. 79(11)
Magazine articles
Proper design and use of suction roll sealing strips in suction roll operation, TAPPI JOURNAL, November 1996, Vol. 79(11)
Proper design and use of suction roll sealing strips in suction roll operation, TAPPI JOURNAL, November 1996, Vol. 79(11)
Magazine articles
Service with a smile: john d. callahan named the 1997 herman l. joachim distinguished service award winner, TAPPI JOURNAL, April 1997, Vol. 80(4)
Service with a smile: john d. callahan named the 1997 herman l. joachim distinguished service award winner, TAPPI JOURNAL, April 1997, Vol. 80(4)
Magazine articles
Theory and reality for contaminant removal curves, TAPPI JOURNAL, April 1997, Vol. 80(4)
Theory and reality for contaminant removal curves, TAPPI JOURNAL, April 1997, Vol. 80(4)
Magazine articles
The enemy within, TAPPI JOURNAL, April 1997, Vol. 80(4)
The enemy within, TAPPI JOURNAL, April 1997, Vol. 80(4)
Magazine articles
Anhydrous ammonia storage vessels in the pulp and paper industry, TAPPI JOURNAL, April 1997, Vol. 80(4)
Anhydrous ammonia storage vessels in the pulp and paper industry, TAPPI JOURNAL, April 1997, Vol. 80(4)
Magazine articles
Shop talk: reducing voc emissions with thermal oxidation units, TAPPI JOURNAL, December 1997, Vol. 80(12)
Shop talk: reducing voc emissions with thermal oxidation units, TAPPI JOURNAL, December 1997, Vol. 80(12)
Journal articles
Magazine articles
Editorial: TAPPI Journal 2024 Best Research Paper focuses on realistic potential for using nonwood residues in sustainable packaging, TAPPI Journal April 2025
ABSTRACT: Each year, the TAPPI Journal Editorial Board honors outstanding content by nominating and voting for the Best Research Paper published the previous year based on scientific merit, innovation, creativity, and clarity. TAPPI and the TAPPI Journal Editorial Board would like to congratulate the authors of the 2024 TAPPI Journal Best Research Paper: Antonio Suarez, Ashok Ghosh, Fritz Paulsen, and Peter W. Hart of Smurfit Westrock (formerly WestRock). The winning paper, “Life cycle carbon analysis of packaging products containing nonwood residues: A case study on linerboard and corrugating medium,” was published in the March 2024 issue.
Journal articles
Magazine articles
Numerical analysis of the impact of rotor and screen hole plate design on the performance of a vertical pulper, TAPPI Journal April 2025
ABSTRACT: The dissolving of mechanical pulp is one of the most important process steps in stock preparation, since pulping occurs at the very beginning of the papermaking process. Efficient mixing of the pulp in a short amount of time is essential to achieve high furnish volume flow rates. The design of the rotor, as well as the pulper vat and inserts, significantly affects the overall performance of the pulper, such as mixing efficiency and power demand. Using advanced numerical methods such as computational fluid dynamics (CFD) can accelerate the development process. The CFD simulations allow for detailed analysis of flow phenomena, making it possible to study a real-size machine numerically. This approach is particularly advantageous because it can reduce the need for timeconsuming and costly experiments associated with scaling up test rigs. In this study, we compared two different rotor designs utilized in a vertical pulper and evaluated the numerical results with experimental data. Rotor A is designed for low turbulence and low power demand, while rotor B is designed for high turbulence with high power demand. The CFD results showed good agreement with the experimental measurements. We investigated how the rotor design influences the free fluid surface and the mixing efficiency. Our study also highlights the differences in results depending on whether water or furnish is simulated, which exhibit Newtonian or, respectively, non-Newtonian fluid behavior. Additionally, a detailed numerical investigation of various screen hole plate designs revealed that the newly developed hole design significantly reduces pressure loss compared to a standard drilled hole. This outcome was consistent for both types of fluids investigated: water and furnish.