Tube Discharge Research Articles

CFD analysis of microscopic particle separation in low-volumetric classifiers: DPM tracking and experimental validation for enhanced efficiency using geometric modification strategy

The increasing demand for advanced air quality management technologies highlights the need for efficient separators capable of classifying microparticles by size. This study introduces a novel approach of geometric modifications to optimize low-volumetric environmental separators through Computational Fluid Dynamics (CFD) simulations. This study investigated micron particle flow behaviour, vortex strength, and separation chamber design using Lagrangian particle tracking to capture the complex particle–fluid interactions. Key geometry modifications included optimizing internal configurations, such as tube arrangements and discharge tube lengths, which resulted in significantly improved separation efficiency. The CFD simulations were validated against experimental data with flow rates ranging from 10 to 20 LPM (Re = 1008, 1512, 2016), demonstrating flow patterns, vorticity, and particle retention. A major contribution of this study is the particle retention efficiency analysis across a wide range of particle sizes. Particles larger than 10 µm were captured with near-perfect efficiency, while capturing finer particles (1–8 µm) proved more challenging, highlighting areas for future improvement. Notably, increasing the number of separation tubes from 3 to 4 and adjusting their heights led to a 10 % increase in particle retention for particle diameters of 10 and 20 µm. Additionally, higher flow rates, especially at 17 LPM (Re = 1714), increased capture rates for medium-sized particles by prolonging residence times through increased turbulence. This research advances micron particle separation technologies through design optimizations, supported by experimental and numerical analysis. The findings have broad implications for improving the performance of environmental separators in industrial applications, and for future developments in air quality management systems.

Association between nasogastric tube feeding and discharge outcomes in patients aged 80 and older with aspiration pneumonia: A propensity score‐matched retrospective cohort study

AbstractBackgroundThis study investigated the association between nasogastric tube feeding (NGF) and discharge rate to previous residences with oral intake in patients aged 80+ with aspiration pneumonia.MethodsA retrospective cohort study included 256 hospitalized patients with aspiration pneumonia from 2012 to 2022, which could not start oral intake within 48 h due to dysphagia. Using 1:2 matched‐pair analysis, the association of interest was examined using logistic regression analysis.ResultsNGF was associated with a lower discharge rate (odds ratio: 0.15; 95% CI: 0.05–0.46).ConclusionPatients with NGF had a lower discharge rate to previous residences with oral intake.

Cole type Pitot tube, discharge factor survey and calibration

This article proposes that the Pitot Cole tube used for measuring water flow in the distribution does not require calibration, as it is an intrinsically self-calibrated equipment. Its function is to transform flow speed (kinetic energy) into manometric pressure, where the measurement is made by manometers or Pitometry Cases. The article also cites a third-degree polynomial equation that automatically corrects the Pitot Cole tube discharge factor rangeability from 3:1 up to 35:1. As a fundamental highlight, added to other article contributions, the credibility achieved today during a flow measurement is cited, reaching an accuracy from 3:1 or better, in the entire measurement range, of 35:1. In the water industry, the Pitot Cole tube interconnected in the Pitometry Case measure and record electronically the flow of treated and distributed water in the consumer sectors and, through specific software, it executes and issues a report comparing the Pitometric measurements against installed and fixed measurement equipment on the same network.

Analysis of energy and exergy of eutectic phase change material solidification for various configuration-based triplex tube

This study delves into the energy and exergy analysis of eutectic PCM solidification within a triplex tube latent heat storage unit featuring inner tubes of triangular, pentagonal, square, and circular configurations, analyzed numerically. Results encompassing the impacts of mean temperature, solidification temperature, melting fraction, exergetic efficiency, exergy destruction, heat transfer rate, entropy generation number, and system efficiency on solidification time are presented and compared using contour maps and figures. The research also scrutinizes the effects of Fourier numbers on Stefan, Rayleigh, and Nusselt numbers for TES systems based on inner configurations. Past studies primarily concentrated on cylindrical shapes for all three tubes within triplex-tube heat exchangers, disregarding varied internal tube configurations. This investigation introduces novelty by investigating diverse innermost tube geometries (triangular, square, pentagonal, circular) within a triplex tube heat exchanger. The tangible advantages encompass enhanced thermal efficiency relevant to industries such as oil and gas, chemical processing, food and beverage, and power generation. The inner triangular triplex tube thermal energy storage (TES) system exhibits superior performance over pentagonal topologies, boasting stronger Stefan and Rayleigh numbers by 22.52% and 22.86%, respectively, at Fo = 0.0023. Eutectic PCM solidifies 50%, 65%, and 66% faster within triangular configurations than the triplex tube's pentagonal, square, and circular interiors.However, the pentagonal inner tube topology outperforms the triangular one by 13.36 % at a solidification time of 300 seconds. Eutectic PCM solidifies faster in triangular TTTES systems due to their 0.3%, 1.02%, and 1.10% lower heat transfer temperatures than pentagonal, square, and circular systems. Furthermore, in 1800 seconds of solidification, the triangular inner tube discharges 20.16%, 4.92%, and 3.37% more than pentagonal, square, and circular TES systems. Pentagonal, square, and circular inner tube topologies are 13.36%, 3.01%, and 3.84% less efficient than triangular TTTES systems. TES systems with triangular shapes achieve rapid solidification of eutectic PCM at 305.24K, establishing their efficiency over pentagonal, square, and circular configurations.

Diffusion flame, heated quartz tube or dielectric barrier discharge? Comparing the resistance of hydride atomizers towards interferences with detection by atomic absorption spectrometry

The resistance of three types of hydride atomizers towards interferences from other hydride forming elements and mercury was comprehensively investigated. Four hydride forming elements (Pb, Bi, Se and Te) were used as model analytes while seven hydride forming elements and mercury were investigated as potential interferents. The atomizers studied were based on a diffusion flame - DF, an externally heated quartz tube (multi)atomizer - (MM)QTA as well as a dielectric barrier discharge plasma - DBD. The performance of even two designs of DBD atomizers was compared. The first configuration (REF-SIN) was realized by a DBD chamber with glued electrodes coupled to a power supply source with sinusoidal modulation of high voltage. The second configuration of the DBD atomizer (SE-SW) comprised of a DBD chamber with the sputtered electrodes powered by a square-wave modulated high voltage source. The DF atomizer was found to be the most robust towards atomization interferences. However, its sensitivity was 30 to 50 times lower compared to (MM)QTA and DBD based atomizers due to its short optical path. The DBD atomizer in REF-SIN arrangement can compete very well with (MM)QTA atomizer in terms of resistence to interferences as well as sensitivity. The resistence of DBD atomizer in SE-SW configuration towards atomization interferences is slightly worse compared to (MM)QTA and DBD in REF-SIN design.

Dedicated home enteral feeding dietitian: Facilitating nasoenteric feeding tube discharges within a specialist oesophagogastric service

Dedicated home enteral feeding dietitian: Facilitating nasoenteric feeding tube discharges within a specialist oesophagogastric service

Oxygen atom and ozone kinetics in the afterglow of a pulse-modulated DC discharge in pure O2: an experimental and modelling study of surface mechanisms and ozone vibrational kinetics

The chemical kinetics of oxygen atoms and ozone molecules were investigated in a fully-modulated DC discharge in pure oxygen gas in a borosilicate glass tube, using cavity ringdown spectroscopy (CRDS) of the optically forbidden O(3P2)→O(1D2) absorption at 630 nm. Measurements were made over a range of tube temperatures (10 °C and 50 °C) gas pressures (0.5–4 Torr) and discharge current (10–40 mA). The discharge current was square-wave modulated (on for 0.2 s and off for 1 s), allowing the build-up to steady-state and the decay in the afterglow to be studied. This paper focusses on the afterglow period. The O atom density decays non-exponentially in the afterglow, indicating a surface loss probability dependent on incident active particle fluxes. The oxygen atom absorption peak lies on a time-varying absorption continuum due (in the afterglow) to the Chappuis bands of ozone. The ozone density passes through a maximum a few 100 ms into the afterglow, then decays slowly. An existing time-resolved self-consistent 1D radial model of O2 positive column discharges was modified to interpret the new results. The ozone behaviour in the afterglow can only be modelled by the inclusion of: (1) surface production of O3 from the reaction of O2 molecules with adsorbed O atoms, (2) reactions of vibrationally-excited ozone with O atoms and with O2(a1Δg) molecules, and (3) surface loss of ozone with a probability of around 10−5.

Removal of the endoplasma membrane upon sperm cell activation after pollen tube discharge.

In pollen and pollen tubes, immotile sperm cells are enclosed by an inner vegetative plasma membrane (IVPM), a single endomembrane originating from the vegetative-cell plasma membrane. It is widely believed that sperm cells must be removed from the IVPM prior to gamete associations and fusions; however, details of the timing and morphological changes upon IVPM dissociation remain elusive. Here, we report a rapid IVPM breakdown immediately before double fertilization in Arabidopsis thaliana. The IVPM was stably observed in coiling pollen tubes when pollen tube discharge was prevented using lorelei mutant ovules. In contrast, a semi-in vivo fertilization assay in wild-type ovules demonstrated fragmented IVPM around sperm nuclei 1min after pollen tube discharge. These observations revealed the dynamic alteration of released sperm cells and provided new insights into double fertilization in flowering plants. With a summary of recent findings on IVPM lipid composition, we discussed the possible physiological signals controlling IVPM breakdown.

COVID-19-Related life-threatening complications: pneumothorax, pneumo mediastinum and subcutaneous emphysema

Complications of COVID-19-related pneumothorax, subcutaneous emphysema, and pneumomediastinum are frequently observed in moderate and severe pneumonia cases. The aim of this study is to determine the incidence and potential risk factors of life-threatening complications such as pneumothorax, pneumo-mediastinum, and subcutaneous emphysema that develop in patients received in the tertiary ICUs of our hospital, which serves as a pandemic hospital and to analyze their relationship with mortality. Patients' demographic characteristics, comorbid diseases, length of hospital stay, day and duration of thoracic tube placement, discharge status, and hospitalization laboratory findings were recorded, and the relationship of these parameters with mortality due to pneumothorax, subcutaneous emphysema, and pneumomediastinum were investigated. Of these patients, 33 had pneumothorax, 12 had pneumomediastinum, and 28 had subcutaneous emphysema. Male and female patients were equally represented, and mortality rates were similar. While the rate of pneumothorax in the study patients was 2.21 %, the rate of all life-threatening sequelae such as pneumothorax, pneumomediastinum, and subcutaneous emphysema was 4.7 %, with a high mortality rate (90 %) in 70 patients with these complications. Patients diagnosed with COVID-19 pneumonia should be constantly monitored for life-threatening complications such as pneumothorax, pneumomediastinum, and subcutaneous emphysema during their long-term follow-up.

Management of bronchopleural fistula using Amplatzer duct occluder device.

Management of bronchopleural fistula using Amplatzer duct occluder device.

Demonstration of production and conceptualization of a continuous beam of X-Rays electromagnetic radiation, from Nikola Tesla’s single node tube, with subsequent characterization of the pulsating occult sound frequency, of the inner tube discharge gas, using Artificial Intelligence software, and elaboration of a plan of virtual energy

The life work of Serbian scientist and inventor Nikola Tesla has produced important innovations not only in the field of telecommunications and wireless transmission but also in the fields of electrical distribution systems, fluid propulsion and signaling systems. Such is the amount of his work, especially from the point of view of scientific weight, that his resonance will be felt for many decades in the future, having himself been a precursor. One of the experiences of the Serbian inventor, not well known to most people, is his work on X-rays. His experiments led to the definition, at the same time as German physicist Wilhelm Conrad Roentgen published his discovery on "particularly penetrating rays", in 1895, a form of radiation that could pass through soft tissue, highlighting electron-dense structures such as bones. Of great importance is his work which included not only the production of X-rays through the then known Crookes tubes, with anti-cathode, but also on a new version of the X-ray tubes, the one on which this single node study will be focused. of reduced size and even simpler constitution, compared to the aforementioned Crookes tubes with red-hot cathode rays where, X-rays were produced thanks to the impact of fast electrons (cathode rays) on a heavy metal structure, such as Tungsten, Palladium, or Platinum. Beyond the demonstration of the production of X-Rays, through the Tesla Tube, we have demonstrated the possibility of producing audio frequencies, having the same frequency as the X-Rays, thus defining them, Virtual Energy.

The effectiveness of ARISCAT Risk Index, other scoring systems, and parameters in predicting pulmonary complications after thoracic surgery.

The Assess Respiratory Risk in Surgical Patients in Catalonia (ARISCAT) risk index, which is frequently used in nonthoracic surgery, may not be sufficient to predict postoperative pulmonary complications (PPCs). We aimed to evaluate the effectiveness of the ARISCAT risk index, ASA, preoperative albumin level, neutrophil/lymphocyte ratio (NLR), and other parameters in predicting PPCs after thoracic surgery.Patients undergoing elective thoracic surgery with 1-lung ventilation (OLV) were prospectively analyzed. Demographic data, ARISCAT score, ASA, Nutritional Risk Score-2002, NLR, white blood cell counts, albumin, hemoglobin levels, intraoperative complications, postoperative average visual analogue scale (VAS) score for pain at the 24th-hour, the length of stay in the postoperative intensive care unit, chest tube removal time, postoperative complications, and discharge time were recorded. Patients were assessed for morbidity and mortality on the 90th-day.120 patients’ data were analyzed. PPCs developed in 26 patients. The development of PPCs was statistically significant in patients with high ARISCAT scores (P = .002), high ARISCAT grades (P = .009), and ASA III (P = .002). The albumin level was statistically significantly lower in patients who had mortality within 3 months (P = .007). When scoring systems and laboratory parameters were evaluated together, patients with high ARISCAT grade, Albumin < 35g/L, and ASA III had significantly higher development of PPCs (P = .004).ARISCAT risk index and ASA were found to be significant in predicting PPCs after thoracic surgery. They were also valuable when evaluated in combination with preoperative albumin levels. Additionally; age, male gender, duration of surgery, and duration of OLV were also found to be associated with PPCs.

Intolerance to Early Nasogastric and Nasojejunal Enteral Nutrition in Patients with Moderately Severe Acute Pancreatitis

RELEVANCE Early enteral nutrition is an essential element of intensive care for acute pancreatitis. Its intolerance is manifested by high gastric residual volumes, pain syndrome, bloating, diarrhea, nausea and vomiting. The relevance of our study is determined by the lack of information on how the routes of nutrient delivery affect its tolerability considering the gradual «as­per­protocol» increase in nutrition volumes for patients with moderately severe acute pancreatitis.THE AIM OF THE STUDY Was to identify the key factors that determine intolerance to early nasogastric and nasojejunal enteral feeding in ICU patients with the early phase of moderately severe acute pancreatitis.MATERIAL AND METHODS We conducted an open randomized controlled trial. Out of 64 patients with predicted severe course of acute pancreatitis, we identified a cohort with moderately severe acute pancreatitis, in which 17 (51.5%) patients received early enteral nutrition through a nasogastric tube, and 16 (48.5%) via an endoscopically placed nasojejunal tube. The criteria for nutrition intolerance were as follows: nasogastric tube discharge of more than 500±100 ml at a time or more than 500 ml/day in comparison with the enterally administered during this period, increased pain, bloating, diarrhea, nausea and vomiting. Using the method of logistic regression, indicators with prognostic significance were determined. The null hypothesis was rejected at p&lt;0.05.RESULTS Regardless of the nutrition route, the progression of multiple organ failure increases the incidence of high gastric residual volumes (SOFA — OR (odds ratio) — 1.337, 95% CI (confidence interval) 1.001–1.787; p = 0.049). Pain syndrome is less common on the day of surgery (OR 0.258, 95% CI 0.110–0.606; p=0.002). Nasojejunal feeding was associated with a lower incidence of nausea and vomiting (OR 0.168, 95% CI 0.06–0.473; p=0.001), but with more diarrhea (OR 6.411, 95% CI 1.274–32.262; p=0.024).CONCLUSION The progression of multiple organ failure increases the incidence of high gastric residual volumes. The pain syndrome is less pronounced on the day of surgery and more intense in case of nasogastric nutrition. Postpyloric nutrition reduces the incidence of nausea and vomiting, but increases diarrhea.

Segmentectomy for clinical stage I non-small cell lung cancer: National benchmarks for nodal staging and outcomes by operative approach.

Segmentectomy is increasingly used for parenchyma sparing anatomical resection for small stage I non-small cell lung cancer (NSCLC). This study characterizes the national outcomes for lymph node assessment and perioperative outcomes of segmentectomy for clinical stage I NSCLC by robotic-assisted surgery (RATS), video-assisted thoracoscopic surgery (VATS), and open thoracotomy approach. A retrospective cohort study was conducted of patients who underwent segmentectomy for clinical stage I NSCLC captured in the national Society of Thoracic Surgeons General Thoracic Surgery Database between years 2012 and 2018. Inverse probability of treatment weighting (IPTW) was used to balance baseline characteristics. Lymph node (LN) staging and 30-day outcomes were compared by approach. A total of 3680 patients (VATS 61.9%, RATS 20%, open 18%) underwent segmentectomy. The IPTW adjusted rate of pathologic LN upstaging (pN1/pN2) was 6.2% (RATS 6.3%, VATS 5.6%, open 8.6%; P = .05). On multivariate analysis, there was no differences in pN1/N2 upstaging between RATS (odds ratio [OR], 0.81; 95% confidence interval [CI], 0.44-1.49) or VATS (OR, 0.96; 95% CI, 0.57-1.63) with open segmentectomy. The RATS and VATS approach was associated with fewer postoperative events (RATS 31.3%, VATS 28.8%, open 38.3%; P < .001) and shorter length of stay (RATS 4.3 days, VATS 4.4 days, open 5.2 days; P < .001) as compared with thoracotomy. RATS segmentectomy-specific complications included a higher rate of pneumothorax after chest tube removal and discharge with chest tube. Major complications were lower after RATS and VATS as compared with open segmentectomy (RATS 5.9%, VATS 4.5%, open 7.2%; P = .028). Segmentectomy by VATS and robotic approach resulted in similar high rates of lymph node upstaging as a global marker of the quality of lymph node dissection and were associated with lower overall morbidity and shorter length of stay as compared with open thoracotomy. These national outcomes may serve as benchmarks for future comparative studies.

Comparison of perioperative outcomes of robotic-assisted versus video-assisted thoracoscopic right upper lobectomy in non-small cell lung cancer.

BackgroundRobotic-assisted thoracic surgery (RATS) has been widely used in the treatment of lung cancer. The perioperative outcomes of right upper lobectomy (RUL) using RATS and video-assisted thoracic surgery (VATS) were retrospectively investigated and compared. We aimed to summarize a single-center experience of RATS and 4-port unidirectional VATS in RUL, and to discuss the safety and the essentials of the surgery.MethodsWe retrospectively analyzed the 685 with non-small cell lung cancer (NSCLC) patients who underwent minimally invasive RUL in our center by the same surgical group from January 2015 to December 2019. Both RATS and VATS were performed with three ports with utility incision. The 685 participants were divided into RATS (335 cases) and VATS (350 cases) groups according to surgical method. Baseline characteristics and perioperative outcomes including dissected lymph nodes, postoperative duration of drainage, postoperative hospital stay, and incidence of postoperative complications were compared between the groups.ResultsIn the 685 patients enrolled, the baseline characteristics were comparable, and no postoperative 30-day mortality or intraoperative blood transfusion were observed. Compared with VATS, RATS had less surgical duration (90.22±12.16 vs. 92.68±12.26 min, P<0.001), less length of stay (4.71±1.37 vs. 5.26±1.56 days, P<0.001), and decreased postoperative duration of drainage (3.49±1.15 vs. 4.09±1.57 days, P<0.001). No significant difference was observed in the lymph nodes dissection, blood loss, conversion rate and morbidities. The cost of RATS was much higher than VATS (85,329.41±12,893.44 vs. 68,733.43±14,781.32 CNY, P<0.001).ConclusionsRobot assisted RUL had similar perioperative outcomes compared to VATS RUL lobectomy using similar three port with utility incision technique. The advantages of RATS included finer dissection of lymph node, relatively less operation time, earlier chest tube removal and discharge.

To the pathogenesis and therapy of leucorrhoea

The application of biological techniques and methods to solving the problem of secretions from the genital canal led Landekega (Arch f. G., Bd. 125, H. 3) to the conclusion that leucorrhoea (fluor genitalisl is a qualitatively and quantitatively altered genital tube discharge.

A cross-sectional analysis of infant-driven and traditional feeding outcomes for neonatal intensive care unit infants.

The goal of this study was to assess the impact of infant-driven feeding (IDF) compared to traditional feeding protocols in promoting earlier successful feeding outcomes. We performed a cross-sectional analysis of infants admitted to a level three neonatal intensive care unit (NICU) over a 2-year period. We compared infants fed with the traditional protocol to those under the IDF protocol. Infants in the IDF group were younger at first feed (p < 0.001). There was no difference in age at nasogastric (NG) tube removal or at discharge, length of stay, or percentage breastfeeding at discharge. There were no differences in outcomes within two subgroups born at <35 and <32 weeks gestation, respectively. The IDF program led to earlier initiation of oral feeding. However, this did not lead to earlier NG tube removal or discharge, a shorter length of stay, or increase in the rates of breastfeeding.

Frailty and hospitalization-associated disability after pneumonia: A prospective cohort study

BackgroundPneumonia is a major cause of morbidity and mortality in older adults. The role of frailty assessment in older adults with pneumonia is not well defined. Our purpose of the study was to investigate 30-day clinical course and functional outcomes of pneumonia in older adults with different levels of frailty.MethodsA prospective cohort was conducted at a university hospital in Seoul, Korea with 176 patients who were 65 years or older and hospitalized with pneumonia. A 50-item deficit-accumulation frailty index (FI) (range: 0–1; robust < 0.15, pre-frail 0.15–0.24, mild-to-moderately frail 0.25–0.44, and severely frail ≥ 0.45) and the pneumonia severity CURB-65 score (range: 0–5) were measured. Primary outcome was death or functional decline, defined as worsening dependencies in 21 daily activities and physical tasks in 30 days. Secondary outcomes were intensive care unit admission, psychoactive drug use, nasogastric tube feeding, prolonged hospitalization (length of stay > 15 days), and discharge to a long-term care institution.ResultsThe population had a median age 79 (interquartile range, 75–84) years, 68 (38.6 %) female, and 45 (25.5 %) robust, 36 (47.4 %) pre-frail, 37 (21.0 %) mild-to-moderately frail, and 58 (33.0 %) severely frail patients. After adjusting for age, sex, and CURB-65, the risk of primary outcome for increasing frailty categories was 46.7 %, 61.1 %, 83.8 %, and 86.2 %, respectively (p = 0.014). The risk was higher in patients with frailty (FI ≥ 0.25) than without (FI < 0.25) among those with CURB-65 0–2 points (75 % vs. 52 %; p = 0.022) and among those with CURB-65 3–5 points (93 % vs. 65 %; p = 0.007). In addition, patients with greater frailty were more likely to require nasogastric tube feeding (robust vs. severe frailty: 13.9 % vs. 60.3 %) and prolonged hospitalization (18.2 % vs. 50.9 %) and discharge to a long-term care institution (4.4 % vs. 59.3 %) (p < 0.05 for all). Rates of intensive care unit admission and psychoactive drug use were similar.ConclusionsOlder adults with frailty experience high rates of death or functional decline in 30 days of pneumonia hospitalization, regardless of the pneumonia severity. These results underscore the importance of frailty assessment in the acute care setting.

Readmissions After Lung Transplantation.

Lung transplantation has evolved to become an acceptable therapy for individuals with end-stage lung disease. Readmissions rates after lung transplantation remain high as compared to other medical surgical populations. The purpose of this review is to synthesize the current body of knowledge about patterns, risk factors, and outcomes of readmissions after lung transplantation. The literature revealed that the most common admission diagnoses linked to lung transplant readmissions are infections followed by tachyarrhythmias, airway complications, surgical complications, rejection, thromboembolic events, gastrointestinal complications, and renal dysfunction. Risk factors for these readmissions include male gender, longer intensive care unit stay, reintubation, prolonged chest tube air leak, frailty, and discharge to a long-term care facility. Outcomes of multiple readmissions after lung transplantation are associated with decreased survival and increased risk of mortality. Further research is needed to better understand which readmission diagnoses are preventable and whether multidisciplinary interventions can reduce readmission rates among patients after lung transplantation.

Comparison of an analytical and computational fluid-dynamics models of a commercial Ranque-Hilsch vortex tube operating with Air and Methane

This paper presents a comparison between the behavior predicted by a computational fluid-dynamic model (CFD) and an analytical model for a commercial vortex tube using air and methane as working fluids, in addition to a three-dimensional mesh for this purpose. The numerical simulation of the turbulent, compressible and high vorticity flow was carried out using RANS equations, the Realizable k-e turbulence model and STAR-CCM+ as software for the equations solution. The variables measured in this work were temperature, pressure and velocity at the exit nozzles of the vortex generator and the tube discharges, resulting in errors of less than 16% between CFD and the analytical model. This numerical study represents a first approximation of the vorticityphenomenon and has been developed in order to establish a prototype simulation model that provides, under certain inlet conditions to the process, preliminary information on the vortex tube industrial implementation for obtaining liquefied natural gas.