Concrete Element Substitution in Fluid Flow Simulation
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Solution Overview
Problem
Convergence problems and calculation failures occur in computational simulations of fluid-flow process engineering apparatuses due to nonlinear calculations of body contact and large deformations, especially in heat exchangers, leading to insurmountable obstacles in achieving accurate simulations.
Innovation Solution
Replace elements made of materials like solder or steel with concrete elements in the simulation, which have comparable force transmission properties, allowing for the simulation of compressive forces and setting a threshold for tensile forces to prevent cracking, thereby enabling reliable stress analysis without convergence issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a procedural apparatus is used to deliver fluid to a patient, then the fluid can be delivered through a catheter, but the catheter may become clogged with thrombus or emboli forming in the catheter lumen
Solution Approach 1:
The system performs preliminary actions by continuously circulating fluid through the catheter before and during the procedure to prevent thrombus and emboli formation. The fluid circulation is maintained proactively to keep the catheter lumen clear, preventing clogging before it occurs rather than addressing it after formation.
Solution Approach 2:
The system incorporates feedback mechanisms through sensors that monitor fluid flow, pressure, and other parameters to detect changes in catheter patency. This feedback information is used to adjust the fluid circulation rate and pressure to maintain optimal conditions for preventing thrombus and emboli formation.
2Reliability
If fluid is circulated through the catheter to prevent clogging, then catheter patency is maintained, but the system complexity increases with additional pumps and sensors
Solution Approach 1:
The fluid circulation system is designed to serve multiple functions: it delivers medication, maintains catheter patency, and provides a mechanism for removing thrombus and emboli. By making the fluid circulation system multi-functional, the patent reduces the need for separate dedicated systems for each function, thereby managing complexity.
Solution Approach 2:
The system uses the patient's own blood as the circulating fluid, eliminating the need for external fluid reservoirs and complex filtration systems. The blood naturally circulates through the catheter, and the system simply maintains flow and pressure, reducing overall system complexity while achieving catheter patency.
3Productivity
If the catheter tip is positioned near the heart, then effective drug delivery is achieved, but the risk of emboli entering the arterial system increases
Solution Approach 1:
The system performs preliminary actions by continuously circulating fluid through the catheter before and during the procedure to prevent thrombus and emboli formation. The fluid circulation is maintained proactively to keep the catheter lumen clear, preventing clogging before it occurs rather than addressing it after formation.
Solution Approach 2:
The system incorporates feedback mechanisms through sensors that monitor fluid flow, pressure, and other parameters to detect changes in catheter patency. This feedback information is used to adjust the fluid circulation rate and pressure to maintain optimal conditions for preventing thrombus and emboli formation.
Data Source
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AI summary
The present invention relates to a method for the theoretical analysis of a process apparatus through which fluid flows, wherein a theoretical, in particular numerical simulation of the apparatus or of at least one part of the apparatus is carried out (201), wherein at least one element of the apparatus which does not comprise concrete as a material is replaced in the theoretical simulation by at least one concrete element which is manufactured from concrete (202), and wherein a load analysis of the apparatus is carried out (204) with the aid of the theoretical simulation.