Inlet Oil Research Articles

Heat Transfer Analysis of Thermal Oil Plant on Fuel Oil Tanks of 17500 LTDW Product Oil Tanker

The thermal oil system is one type of heater that widely used on ships. The system is an important system used to heat fuel that will be used for the operation of the main engine, auxiliary engine, and boiler. This system has been installed on 17500 LTDW Product Oil Tanker, MT. Parigi, but not yet tested so that it does not know whether the system is able or not to transfer heat from heating equipment (boiler and economizer) to each fuel tank in accordance with the desired value. Therefore, this research performs an engineering evaluation in term of heat transfer analysis to ensure that the heat transfer process of thermal oil from heating equipment to the fuel tanks is already meeting the required temperature or not. This analysis is done by using thermodynamic equation, namely heat balance equation and heat loss equation. The result shows that the heat transfer of thermal oil to each fuel tank corresponds to the desired value, namely 180 o C for the thermal oil inlet temperature to each fuel tank and 140 o C for the thermal oil re-enter temperature to the heating equipment.

Lubrication performance analysis of crankshaft bush in compressor

Abstract The instability of lubricating oil film has a great effect on the wear of friction pairs and carrying capacity of the parts as well as smooth running of the machine. The lubrication system of crankshaft bush plays an important role in the good operation of compressor unit, reduces production cost while improving production efficiency. In this paper, lubrication performance of the crankshaft bush in compressor was investigated. Parameters involved in the lubrication of bush are studied and analyzed systematically during the stable rotation of crankshaft. Effects of lubrication parameters, such as width diameter ratio, crankshaft speed, inlet pressure, attitude angle and the minimum oil film thickness, on the pressure and distribution of lubricant film were discussed. At last, the optimum value and recommended range of some parameters of bush are determined, and the quantization is carried out within a certain range. The results show that two symmetrical distributions of positive and negative high pressure concentrated areas on both sides of bush oil groove can be formed when the crankshaft is stable. The speed and width diameter ratio have a great effect on the maximum pressure value of oil film. The inlet oil pressure and the minimum oil film thickness are the second, and the inlet attitude angle has little effect. With the increase of width diameter ratio, the maximum pressure value of the positive high pressure concentrated area increases, and the negative areas decreases. With the increase of oil inlet pressure, the maximum oil film pressure increases too but the influence is small. With the increasing of minimum oil film thickness, the maximum pressure and carrying capacity of oil film decrease. If the clearance between crankshaft and bush is too small, oil film can't be formed. For the analysis model in this paper, it is recommended that the radius clearance of bush is 0.04 mm. The inlet oil pressure range of lubricating oil is 0.32–0.36 MPa. Those results can be used in the design, testing and evaluation of the crankshaft system in compressor.

Field Trials Help Boost Processing Capacity of Offshore Facility Above Nameplate Limit

This article, written by Special Publications Editor Adam Wilson, contains highlights of paper SPE 187129, “Demonstration of Processing-Capacity Enhancement on an Offshore Facility Through Systematic Field Trials,” by Neil Rodrigues, SPE, and Nikhil Joshi, SPE, Anadarko; Ricky L. Jagneaux, Nalco Champion; and Kashyap P. Kapadia, Moulinex Business Services, prepared for the 2017 SPE Annual Technical Conference and Exhibition, San Antonio, Texas, USA, 9–11 October. The paper has not been peer reviewed. The Constitution spar in the Gulf of Mexico has an original nameplate separation capacity of 70,000 BOPD and 200 MMscf/D of gas. Production potential from future developments is expected to exceed this limit. In order to maximize value, a systematic effort is under way to enhance the throughput of the facility. Field tests were performed with the goal of identifying any deficiencies that would inhibit the facility from reaching nameplate capacity and identifying areas of improvement that would allow the facility to process beyond this limit. Facility Processing Overview On the Constitution spar (Fig. 1), unprocessed fluids from the reservoir pass through production trains where bulk oil/gas and oil/water separation takes place. Train 1 consists of high-pressure (HP), intermediate-pressure (IP), and low-pressure (LP) oil separators, and Train 2 consists of HP oil, HP inlet gas, and LP oil separators. In Train 1, the HP and IP oil separators are two-phase vessels designed for gas/liquid separation and the LP oil separator is a three-phase vessel designed for both gas/liquid and oil/water separation. Similarly, in Train 2, the HP oil and HP inlet gas separators are two-phase vessels and the LP oil separator is a three-phase vessel. The oil from the LP oil separators in Trains 1 and 2 is commingled and passes through the treater, which is designed to condition the oil to meet export-oil specifications for Reid vapor pressure and basic sediment and water (BS&W). The water from the LP oil separators in Trains 1 and 2 passes through hydrocyclones and then to a flotation unit, designed to remove any free oil and impurities to maintain overboard-discharge-water specifications. The gas from the production separators is compressed through a three-stage flash gas compressor. It then passes through a dehydration unit that consists of a gas cooler, scrubber, glycol contactor, and glycol-regeneration skid. The purpose of these vessels is to remove any entrained hydrocarbons and water to meet export-gas specifications.

An Investigation on the Efficiency Correction Method of the Turbocharger at Low Speed

The heat transfer in the turbocharger occurs due to the temperature difference between the exhaust gas and intake air, coolant, and oil. This heat transfer causes the efficiency of the compressor and turbine to be distorted, which is known to be exacerbated during low rotational speeds. Thus, this study proposes a method to mitigate the distortion of the test result data caused by heat transfer in the turbocharger. With this method, the representative compressor temperature is defined and the heat transfer rate of the compressor is calculated by considering the effect of the oil and turbine inlet temperatures at low rotation speeds, when the cold and the hot gas test are simultaneously performed. The correction of compressor efficiency, depending on the turbine inlet temperature, was performed through both hot and cold gas tests and the results showed a maximum of 16% error prior to correction and a maximum of 3% error after the correction. In addition, it shows that it is possible to correct the efficiency distortion of the turbocharger by heat transfer by correcting to the combined turbine efficiency based on the corrected compressor efficiency.

Analysis of Hydrodynamic Journal Bearing Including Thermal Effect

In hydrodynamic journal bearing, due to shearing action, temperature of the oil film increases. On account of rise in temperature, viscosity of the lubricant is reduced which in turn leads to decrease in load carrying capacity of the film. Hence, for better estimation of bearing performance, thermohydrodynamic (THD) analysis of journal bearing is essential. An appropriate boundary condition should be identified to predict results corresponding to the actual conditions. In this paper, steady-state analysis is presented to study the influence of thermal boundary conditions namely, Adiabatic, Isoadiabatic (ISOADI) and Full thermal (THD), on the simulation results of journal bearing. Finite difference method is used to discretize the governing equations. Generalized Reynolds equation, viscosity-temperature relationship and two dimensional energy equation are solved simultaneously. Correction factor for thermal characteristics in cavitation zone and the energy balance at oil inlet have been taken into consideration. In cases of ISOADI and THD, shaft metal body is assumed as an isothermal surface having a zero net heat flux. Full THD boundary condition is capable to account heat transfer through bush. Effect of eccentricity ratio on performance characteristics have been studied for various thermal boundary cases. Results obtained by including thermal effect have been compared with the isothermal results. Load carrying capacity of the bearing obtained by including thermal effect seems to be realistic and is lower than isothermal solution. It is noticed that performance characteristics of the bearing for Adiabatic, ISOADI and THD cases, have no significant variation. However, maximum temperature within the oil film for adiabatic case is more than ISOADI and THD condition. Comparison between the present results and available experimental results indicate that ISOADI / THD is appropriate and realistic than the adiabatic case.

Selecting a squeeze film damper model for solving problems of gas turbine engine rotor dynamics

Various standard mathematical squeeze film damper (SFD) models that can be applied for solving rotor dynamics problems of gas turbine engines (GTE) are presently available. The accuracy of simulation is ultimately affected by the choice of a certain SFD formulation that depends on many factors geometry parameters, oil supply method, oil inlet pressure, operating conditions etc. The present contribution suggests some recommendations for selecting a particular mathematical SFD model and compares the simulation results obtained with different SFD formulations. To this end a point rotor system is numerically analyzed with the aid of the DYNAMICS R4 (www.alfatran.com) software.

Numerical study of surface dimple phenomenon by starvation in simple sliding contact

PurposeThis study aims to use a thermal elastohydrodynamic lubrication (EHL) algorithm incorporating an Eyring flow model to solve a steady-state contact in simple sliding motion.Design/methodology/approachA theoretical model was used to investigate the effect of starvation on the surface dimple phenomenon by gradually reducing the thickness of the inlet oil layer.FindingsThe increase in the starvation degree reduces the dimple depth, film thickness, the pressure peak and the temperature rise. Under the severe starvation condition, the dimple is eliminated so that the EHL contact becomes partly parched. In elliptical results, for the same starvation parameters, the oil replenishment is stronger than that in circular contact.Originality/valueThis paper fulfils an exploration to study how the oil starvation influences the surface dimple phenomenon.

Study on influence of inlet and outlet flow rates on oil pressures and braking torque in a hydrodynamic retarder

PurposeTraditional prediction of braking characteristics of vehicular hydrodynamic retarders is commonly conducted based on braking characteristics model of closed working chamber, namely, closed working chamber model (CWCM). In CWCM, inlet and outlet oil pressures and braking torque are considered to be independent of inlet and outlet flow rates. However, inlet and outlet flow rates can affect internal and external braking characteristics under actual working conditions. This study aims to establish a more accurate braking characteristics model of a hydrodynamic retarder under full oil-charging condition, and then the influence of varying inlet and outlet flow rates on oil pressures and braking torque is investigated in this paper.Design/methodology/approachA full flow passage of working chamber in a hydrodynamic retarder with inlet and outlets was established, and the reliability of numerical model was analyzed and validated. Pressure rise was introduced to describe the variation of inlet and outlet oil pressures. Then, on the basis of the validation, the CWCM was proposed at different rotor rotational speeds. The inlet and outlet oil pressures and braking torque were numerically computed at different inlet and outlet flow rates with Full Factorial Design experimental method. The results obtained were involved into establishing the braking characteristics model of open working chamber, namely, open working chamber model (OWCM), combined with Radial basis function approximation model. The OWCM with different inlet and outlet flow rates was analyzed and compared with CWCM.FindingsThe results show that inlet and outlet flow rates have obvious influence on the variation of inlet and outlet oil pressures in OWCM compared with CWCM. The outlet A pressure rise significantly changes with the inlet and outlet A flow rates, while the pressure rise of outlet B is mainly affected by the outlet B flow rate.Originality/valueThis paper presents an OWCM of hydrodynamic retarders under full oil-charging condition. The model takes into account the impact of oil inflowing and outflowing from the working chamber, which can provide a more accurate prediction of braking characteristics of hydrodynamic retarders.

Breakup and coalescence regularity of non-dilute oil drops in a vane-type swirling flow field

In this work, in order to investigate the behavior of non-dilute drops, including breakup, coalescence and trajectory, in a 100-mm inner-diameter horizontal swirling flow field with low inlet mixture velocity, both an experimental study and numerical simulation were conducted. Inlet oil phase concentration was under 3.0% volume fraction, with an inlet flow rate ranging from 12m3/h to 18m3/h. Malvern RTsizer and Electrical Resistance Tomography were applied for measuring the drop size distribution and oil phase concentration, respectively. Correspondingly, numerical simulations applying a Renormalization-group k-ε turbulent model, coupled with a Discrete Phase Model simulating oil phase, were conducted as well. The results showed that small drops in the flow field tended to coalescence, while the behavior of large drops was determined by the inlet flow rate. A higher inlet flow rate led to a thinner oil core with constant inlet oil concentration. Moreover, the simulation results, which corresponded well with the experimental observations, presented oil drops distribution laws of breakup, coalescence and trajectory in a 100-mm inner diameter swirling flow field and established a prediction model in a similar flow field. Finally, regularity of swirling intense distribution and drop-turbulence interaction in a swirling flow field with a low inlet velocity was established. These results provide new information helpful for the design of vane-type separator.

A Starved Mixed Elastohydrodynamic Lubrication Model for the Prediction of Lubrication Performance, Friction and Flash Temperature With Arbitrary Entrainment Angle

In this study, a modified mixed lubrication model is developed with consideration of machined surface roughness, arbitrary entraining velocity angle, starvation, and cavitation. Model validation is executed by means of comparison between the obtained numerical results and the available starved elastohydrodynamic lubrication (EHL) data found from some previous studies. A comprehensive analysis for the effect of inlet oil supply condition on starvation and cavitation, mixed EHL characteristics, friction and flash temperature in elliptical contacts is conducted in a wide range of operating conditions. In addition, the influence of roughness orientation on film thickness and friction is discussed under different starved lubrication conditions. Obtained results reveal that inlet starvation leads to an obvious reduction of average film thickness and an increase in interasperity cavitation area due to surface roughness, which results in significant increment of asperity contacts, friction, and flash temperature. Besides, the effect of entrainment angle on film thickness will be weakened if the two surfaces operate under starved lubrication condition. Furthermore, the results show that the transverse roughness may yield thicker EHL films and lower friction than the isotropic and longitudinal if starvation is taken into account. Therefore, the starved mixed EHL model can be considered as a useful engineering tool for industrial applications.

Thermal Performance and Efficiency of a Mineral Oil Immersed Server Over Varied Environmental Operating Conditions

Complete immersion of servers in dielectric mineral oil has recently become a promising technique for minimizing cooling energy consumption in data centers. However, a lack of sufficient published data and long-term documentation of oil immersion cooling performance make most data center operators hesitant to apply these approaches to their mission critical facilities. In this study, a single server was fully submerged horizontally in mineral oil. Experiments were conducted to observe the effects of varying the volumetric flow rate and oil inlet temperature on thermal performance and power consumption of the server. Specifically, temperature measurements of the central processing units (CPUs), motherboard (MB) components, and bulk fluid were recorded at steady-state conditions. These results provide an initial bounding envelope of environmental conditions suitable for an oil immersion data center. Comparing with results from baseline tests performed with traditional air cooling, the technology shows a 34.4% reduction in the thermal resistance of the system. Overall, the cooling loop was able to achieve partial power usage effectiveness (pPUECooling) values as low as 1.03. This server level study provides a preview of possible facility energy savings by utilizing high temperature, low flow rate oil for cooling. A discussion on additional opportunities for optimization of information technology (IT) hardware and implementation of oil cooling is also included.

Multiobjective optimization of thermohydrodynamic journal bearing using MOPSO algorithm

This article focuses on the use of multiobjective particle swarm optimization algorithm in combination with the thermohydrodynamic governing equations of fluid film (i.e. momentum and energy equations) in developing an efficient design method to optimize hydrodynamic partial pad journal bearings, for the first time. The governing equations are solved by using the central difference technique with a successive over relaxation scheme. In the simulation, the lubricant viscosity is changed with the temperature variation in whole fluid film. In this problem, the bearing power loss, the minimum oil film thickness, and the maximum oil temperature are selected as three objective functions and the radial clearance and length-to-diameter ratio are considered as two important design variables. The results of the objective functions are presented in tabular and Pareto-front curves. Further, the effect of bearing speed, bearing load, and inlet oil temperature on the mentioned objective functions is illustrated.

Numerical investigation on the oscillating flow and uneven heat transfer processes of the cooling oil inside a piston gallery

In previous research of achieving high cooling efficiency of engine pistons, the phenomenon of uneven heat transfer has not been investigated or recognized. These issues lead to a greater piston temperature gradient and its effects on engine durability have not been paid sufficient attention. In this research, a piston gallery was classified into four regions and several zones per region to investigate oscillating oil flows and uneven heat transfer distributions with a Relative Displacement Method (RDM). The RDM allows the cooling gallery to be treated as a rigid body, and the original constant boundary conditions could be translated into varying conditions that change as a function of engine crank angle. The relationships are investigated between the heat transfer performance and some factors such as the movement conditions of the air-oil two-phase flow inside the gallery, the instantaneous oil distributions, the relative oil velocity, the instantaneous acceleration and the velocity of the piston. The results reveal that the instantaneous oil charge ratio decreases and the area-weighted heat transfer coefficient increases as the engine speed increases. Different regions exhibit more apparent uneven heat transfer at higher engine speeds, and the top and bottom regions play a dominant role in the overall heat transfer coefficient. When the gallery was positioned closer to the oil inlet passage, the uneven heat transfer is more intense.

Fibrous deep-bed filtration for oil/water separation using sunflower pith as filter media

The application of agricultural by-products as filter bed material for the treatment of oily wastewater is preferable due to their biodegradability and availability. The goal of this paper was to examine the sorption and filtration properties of sunflower (Lat. Helianthus annuus) fibres in a raw state. SEM imaging and nitrogen adsorption at −196.15°C were applied to evaluate sorbent morphology. FTIR spectroscopy was used to determine the chemical composition of the pith. Studies on sorption in static conditions (pith fragmentation 1.5–4.0mm) allowed process kinetics to be specified. The experimental kinetics was fitted to pseudo first-order and pseudo second-order kinetics by a non-linear method. To better predict kinetic parameters, a new modified logistic equation was proposed. Sunflower fibre was found to have high oil sorption capacity (12.67g/g) and good retention properties.During filtration experiments, an artificial reservoir brine (0.1, 2.0, and 20.0g/l of oil) was used as an oil-in-water emulsion; sunflower pith was used as a filter medium. The influence of four process parameters (pH, bed height, initial oil concentration, and flow rate) on removal efficiency was studied. Oil concentrations were determined by gas chromatography. The results demonstrated that the prepared filters operated better at a lower pH, lower flow, a deeper bed material, and higher concentration of inlet oil. The filtration efficiency for the removal of crude oil from oily brines reached more than 99% in the initial stage of the process. The results obtained suggest that natural plant fibres can be an effective bed material to separate oil from oily brine.

Reduced model for the thermo-fluid dynamic analysis of a power transformer radiator working in ONAF mode

This work introduces an extension of the semi-analytical reduced model presented in Ríos Rodriguez et al. (2016), with the aim of analyzing the thermo-fluid dynamic behavior of a power transformer radiator working in ONAF (Oil Natural Air Forced) mode, considering vertical blowing of the fans. The objective of this research paper is the development of a numerical tool to be used during the design process of power transformers in order to obtain more detailed information about the radiators performance, either they are working in ONAF or ONAN (Oil Natural Air Natural) mode. Since it is observed both in the experimental measurements and in the numerical simulations that not all the radiator panels are blown by a single fan, the reduced model here presented considers a mixed situation wherein the heat is removed by natural convection in a fraction of the radiator while in the rest the heat is removed by forced convection. As a consequence, besides adding to the set of conservation equations introduced in Ríos Rodriguez et al. (2016) those corresponding to the momentum and energy balance for considering forced heat convection transfer, there appears the need of introducing additional equations for coupling the natural and forced heat convection transfer models. The reduced model developed in this work is applied to estimate different characteristic parameters of a power transformer radiator working in ONAF mode, like the oil flow rate, dissipated power, outlet and inlet oil temperatures, among others. The computed results are compared to those obtained by CFD simulations and experimental measurements carried out on an ad-hoc workbench for validation purposes. It is found that the reduced model reproduces with acceptable accuracy the values of the most important design variables at a very low computation cost. In this manner, it can be considered as a reliable and valuable tool in the design of power transformers, allowing to carry out parametric studies.

CALCULATION OF CFD-THERMAL MODELS OF OIL-COOLED TRANSFORMER EQUIPMENT

The purpose of the study is to ensure designing of full-function and stable CFD-simulation procedure for integrated thermal models of the transformers and the reactors, as well as to receive the approval of method of quality and abilities using the calculation examples of full-scale models of the equipment, along with autonomous models of coil-type windings having various design versions of heat-transfer intensification. Research Methods. Computational Fluid Dynamics (CFD) method of mathematical simulation of nonlinear processes as concerns hydrodynamics and heat transfer in the transformer equipment using finite-element analysis is employed. The results obtained. The paper presents the main elements of technique for creation of mathematical models; it also contains the examples of CFD-calculations as referred to axisymmetrical integrated models of furnace transformer and gapped-core shunt reactor, as well as the models of windings having design approaches of heat exchange intensification owing to «labyrinth» (partitions) and «alternation» (of number and locations) of axial cooling ducts. Scientific novelty. Scientific value of applied methodological approach lies in the fact that the developed models are the integrated ones, i.e., they consider geometry, loss, thermal parameters not only of the windings, but also of the main structural elements and cooling system. This ensures the quality and the accuracy of simulation of heat-and-mass transfer processes in complex structure of oil ducts and coils in the windings, enables to avoid erroneous «zigzag» oil flow movement through the groups of coil regular structures (without labyrinth and «alternation» of number and locations of axial ducts under conditions of transformer oil natural cooling as was deduced in the certain studies. Practical significance. Integrated models ensure calculation of oil temperature distribution within active part, including winding fields, oil temperature field between the tank and the windings, temperatures at oil outlet from the tank (top) and oil inlet into the tank (bottom). Calculations allow estimation of mean temperature distribution over the crosssection of winding coils, mean winding temperatures by means of averaging of the temperatures within the coils, detection of location and maximum temperature on the surface of conductors relevant to the most heated coil. The latter is treated as winding hot spot temperature (HST) and used to evaluate the aging of the contacting insulation. Determination of winding hot spot locations and temperatures (HST) is used as support data for installation areas of fiber optic probes for measurement during type testing, as well as in operational monitoring systems of the equipment. The results presented above are practically applied for industrial designing and testing of transformers and reactors.

Numerical investigation into coolant liquid velocity effect on forced convection quenching process

In this paper, forced convection quenching process of hot pieces in the subcooled liquid is numerically investigated. The Volume Of Fluid method is extended to simulate boiling phenomena and re-condensation of vapor bubbles in the quenching process. The developed CFD code is validated and there is a good agreement between the developed code and existing analytical solution and also experimental data. Quenching oil is selected as the working fluid and liquid-vapor phase is considered incompressible and immiscible. Energy equation in the solid region is also solved to find out temperature distribution within the hot piece. To consider the different flow conditions during the process, forced convection quenching of a step plate at different inlet velocities in the range of 0.1–0.6m/s is studied. All the simulations are performed in laminar flow region and the effect of oil inlet velocity on some parameters such as variation of temperature with time, heat transfer rate, temperature uniformity index and oil pumping power are investigated. Investigation of uniformity index, heat extraction rate and pumping power parameters showed that 0.3m/s entrance velocity is the most appropriate choice for forced convection quenching of step plates in small sizes.

터보차저 공급 오일 압력과 온도가 풀-플로팅 베어링의 동적 거동에 미치는 영향

터보차저 공급 오일 압력과 온도가 풀-플로팅 베어링의 동적 거동에 미치는 영향

Study of the impact of structural parameters on the dynamic response of an electronic fuel injector

The study concentrates on the effects of structural parameters of an electronic fuel injector on its dynamic response (the opening delay and the closing delay). The injector was developed for a marine medium-speed diesel engine. The dynamic response from the start of the control signal to the end of the needle valve closing were investigated. Firstly, a complete and detailed model of the electronic fuel injector was built and integrated into an optimisation model, where a MOGA was applied. Secondly, the importance and effects of main structural parameters on dynamic response were examined, as were their interactions. Finally, a Pareto optimum was obtained through scattering charts and comparisons were made between the baseline design and the optimal design. Results show that the control piston diameter, fuel oil inlet passage diameter, fuel oil outlet passage diameter and their interactions are influential factors to the opening delay, while the fuel oil inlet passage diameter has the dominant effect on the closing delay. A small control piston diameter together with a small fuel oil inlet passage diameter contribute to a short opening delay, however, they lead to a significant increase in the closing delay. Moreover, a small closing delay prefers a large fuel oil inlet passage diameter. The selected Pareto optimum achieved a significant reduction in both the opening delay and the closing delay under three different rail pressures.

A Computational Fluid Dynamics Simulation of Oil–Air Flow Between the Cage and Inner Race of an Aero-engine Bearing

In aero-engines, the shafts are supported on bearings that carry the radial and axial loads. A ball bearing is made up of an inner race, an outer race, and a cage, which contains the balls, these together comprise the bearing elements. The bearings require oil for lubrication and cooling. The design of the bearing studied in this work is such that the oil is fed to the bearing through holes/slots in the inner race. At each axial feed location, the oil is fed through a number of equispaced feedholes/slots but there are a different number of holes at each location. Once the oil has passed through the bearing, it sheds outward from both sides into compartments known as the bearing chambers. A number of studies have been carried out on the dynamics of bearings. Most of the analyses consider the contributions of fluid forces as small relative to the interaction of the bearing elements. One of the most sophisticated models for a cage–raceway analysis is based on the work of Ashmore et al. (2003, “Hydrodynamic Support and Dynamic Response for an Inner-Piloted Bearing Cage,” Proc. Inst. Mech. Eng. Part G, 217, pp. 19–28], where the cage–raceway is considered to be a short journal bearing divided into sectors by the oil feeds. It is further assumed that the oil exits from the holes and forms a continuous block of oil that exits outward on both sides of the cage–raceway. In the model, the Reynolds equation is used to estimate the oil dynamics. Of interest in this current work is the behavior of the oil and air within the space bounded by the cage and inner race. The aim is to determine whether oil feed to the bearing can be modeled as coming from a continuous slot or if the discrete entry points must be modeled. A volume of fluid (VOF) computational fluid dynamics (CFD) approach is applied. A sector of a ball bearing is modeled with a fine mesh, and the detailed simulations show the flow behavior for different oil splits to the three feed locations of the bearing, thus providing information useful to understanding oil shedding into the bearing chambers. This work shows that different flow behaviors are predicted by models where the oil inlets through a continuous slot are compared to discrete entry holes. The form and speed of oil shedding from the bearing are found to depend strongly on shaft speed with the shedding speed being slightly higher than the cage linear speed. The break-up pattern of oil on the cage inner surface suggests that smaller droplets will be shed at higher shaft speed.