The importance of air bubble dynamics in liquid is some phenomena like chemical and biochemical processes refinery units. 2D Volume Fluid (VOF) method together with the CFD technique were employed for simulating. dynamic meshing used to simulate hydrodynamics rising water column via User Defined Function (UDF) code C++ environment was developed evaluate through column. a stagnant has been consi...

There is a growing demand for application of personalized bone implants (endoprostheses or macro-scaffolds, and fixators) which conform the anatomy patient. Hence need CAD procedure that enables fast sufficiently accurate digital reconstruction traumatized geometry. Research presented in this paper addresses femoral neck fracture. The results point out User-Defined (geometric) Feature (UDF) con...

The hydrodynamics of the waterjet-propelled ship is a challenging issue due to sophistication waterjet system geometry as well waterjet–hull interaction. In current study, three different propulsion models, namely, multiple reference frame (MRF) model, sliding mesh model and body-force are utilized simulate self-propulsion model. A based on User-Defined Function (UDF) ANSYS Fluent platform prop...

In this work we develop, demonstrate, and distribute the code for a new Simulink block that models the dynamic evolution of the population density function for a physical system which can be modeled by a population balance equation. The name of the block is PCSS, for population balance modeling using the conservation element/solution element method in Simulink. The block interfaces with an auxi...

Query optimizers in object-relational database management systems require users to provide the execution cost models of user-defined functions(UDFs). Despite this need, however, there has been little work done to provide such a model. Furthermore, none of the existing work is self-tuning and, therefore, cannot adapt to changing UDF execution patterns. This paper addresses this problem by introd...

Abstract This paper aims to reduce the wind resistance of self-designed offshore tourism platform by optimizing its superstructure, and a transparent shape design is finally suggested. A numerical simulation was performed calculate load on test effect reduction. Two original scale models (sealed transparent) were established in accordance with requirements. The uses FLUENT software combined bui...

Inspired by the cactus in nature, a cactus-like cross-sectional structure was proposed to achieve VIV suppression. The of elastically mounted cylinder realized based on ANSYS Fluent and User Defined Function (UDF). dynamic motion solved single-step time integration algorithms Newmark-β method. in-house code first validated studying 2DOF circular with small mass ratio over range U*=2~13, results...

In this study, three-dimensional steady-state non-transferred arc plasma torch was investigated by computational fluid dynamics (CFD) method with user defined function (UDF). Two-equation current density profile was developed to simulate the complex plasma flow inside the torch. The effect of asymmetric distribution of current density (ADCD), particularly the deviation distance (distance betwee...